Insert Dealer Name] [Insert Dealer Address] August [__], 2013 To: ServiceSource International, Inc. 634 Second Street San Francisco, California 94107 Attention: [ ] Telephone No.: [ ] Facsimile No.: [ ]

[Insert Dealer Name]

[Insert Dealer Address]

August [__], 2013

Re: [Base] [Additional] Call Option Transaction

The purpose of this letter agreement (this "Confirmation") is to confirm the terms and conditions of the call option transaction entered into between [______] ("Dealer") and ServiceSource International, Inc. ("Counterparty") as of the Trade Date specified below (the "Transaction"). This letter agreement constitutes a "Confirmation" as referred to in the ISDA Master Agreement specified below. This Confirmation shall replace any previous agreements and serve as the final documentation for the Transaction.

The definitions and provisions contained in the 2002 ISDA Equity Derivatives Definitions (the "Equity Definitions"), as published by the International Swaps and Derivatives Association, Inc. ("ISDA") are incorporated into this Confirmation. In the event of any inconsistency between the Equity Definitions and this Confirmation, this Confirmation shall govern. Certain defined terms used herein are based on terms that are defined in the Offering Memorandum dated August [__], 2013, (the "Offering Memorandum") relating to the [_]% Convertible Senior Notes due 2018 (as originally issued by Counterparty, the "Convertible Notes" and each USD 1,000 principal amount of Convertible Notes, a "Convertible Note") issued by Counterparty in an aggregate initial principal amount of USD [_____] [(as increased by up to an aggregate principal amount of USD [___] if and to the extent that the Representative (as defined herein) exercises its option to purchase additional Convertible Notes pursuant to the Purchase Agreement (as defined herein))]¹ pursuant to an Indenture to be dated August [___], 2013 (the "Indenture"), between Counterparty and ▇▇▇▇▇ Fargo Bank, N.A., as trustee (the "Trustee"). In the event of any inconsistency between the terms defined in the Offering Memorandum, the Indenture and this Confirmation, this Confirmation shall govern. The parties acknowledge that this Confirmation is entered into on the date hereof with the understanding that (i) definitions set forth in the Indenture which are also defined herein by reference to the Indenture and (ii) sections of the Indenture that are referred to herein, in each case, will conform to the descriptions thereof in the Offering Memorandum. If any such definitions in the Indenture or any such sections of the Indenture differ from the descriptions thereof in the Offering Memorandum, the descriptions thereof in the Offering Memorandum will govern for purposes of this Confirmation. The parties further acknowledge that the Indenture section numbers used herein are based on the [draft of the Indenture last reviewed by Dealer and Counterparty as of the date of this Confirmation, and if any such section numbers are changed in the Indenture as executed, the parties will amend this Confirmation in good faith to preserve the intent of the parties]² [Indenture as executed]³. Subject to the foregoing, references to the Indenture herein are references to the Indenture as in effect on the date of its execution, and if the Indenture is amended following such date, any such amendment (other than any amendment pursuant to Section 10.01(j) of the Indenture that, as determined by the Calculation Agent, conforms the Indenture to the description of the Convertible Notes in the Offering Memorandum) will be disregarded for purposes of this Confirmation unless the parties agree otherwise in writing.⁴

__________________

¹ Delete for Additional Call Option Confirmation.
² Insert in the Base Call Option Confirmation. Insert in the Additional Call Option Confirmation if it is executed before closing of the base deal.
³ Insert in the Additional Call Option Confirmation, but only if it is executed after closing of the base deal.
⁴ To be guaranteed by parent if trade booked through entity that does not hold deposits.

Each party is hereby advised, and each such party acknowledges, that the other party has engaged in, or refrained from engaging in, substantial financial transactions and has taken other material actions in reliance upon the parties' entry into the Transaction to which this Confirmation relates on the terms and conditions set forth below.

1. This Confirmation evidences a complete and binding agreement between Dealer and Counterparty as to the terms of the Transaction to which this Confirmation relates. This Confirmation shall supplement, form a part of, and be subject to an agreement in the form of the 2002 ISDA Master Agreement (the "Agreement") as if Dealer and Counterparty had executed an agreement in such form (but without any Schedule except for the election of the laws of the State of New York as the governing law (without reference to choice of law doctrine)) on the Trade Date. In the event of any inconsistency between provisions of the Agreement and this Confirmation, this Confirmation will prevail for the purpose of the Transaction to which this Confirmation relates. The parties hereby agree that no transaction other than the Transaction to which this Confirmation relates shall be governed by the Agreement.
2. The terms of the particular Transaction to which this Confirmation relates are as follows:

General Terms.
Trade Date:	August [__], 2013
Effective Date:	The third Exchange Business Day immediately prior to the Premium Payment Date
Option Style:	"Modified American", as described under "Procedures for Exercise" below
Option Type:	Call
Buyer:	Counterparty
Seller:	Dealer
Shares:	The common stock of Counterparty, par value USD 0.0001 per share (Exchange symbol "SREV")
Number of Options:	[____]5. For the avoidance of doubt, the Number of Options shall be reduced by any Options exercised by Counterparty. In no event will the Number of Options be less than zero.
Applicable Percentage:	[__]6%
Option Entitlement:	A number equal to the product of the Applicable Percentage and [__]7
Strike Price:	USD [___]8
Premium:	USD [___]
Premium Payment Date:	August [__], 2013

__________________

⁵ For the Base Call Option Confirmation, to be the number of Convertible Notes in principal amount of $1,000 initially issued on the closing date for the Convertible Notes. For the Additional Call Option Confirmation, to be the number of additional Convertible Notes in principal amount of $1,000.
⁶ To be the relevant percentage for each Dealer.
⁷ To be the initial Conversion Rate for the Convertible Notes.
⁸ To be the Initial Conversion Price for the Convertible Notes.

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Exchange:	The NASDAQ Global Select Market
Related Exchange(s):	All Exchanges; provided that Section 1.26 of the Equity Definitions shall be amended to add the words "United States" before the word "exchange" in the tenth line of such section.
Excluded Provisions:	Section 14.03 and Section 14.04(h) of the Indenture
Procedures for Exercise.
Conversion Date:	With respect to any conversion of a Convertible Note, the date on which the Holder (as such term is defined in the Indenture) of such Convertible Note satisfies all of the requirements for conversion thereof as set forth in Section 14.02(c) of the Indenture. Options may only be exercised hereunder on a Conversion Date in respect of the Convertible Notes and only in an amount equal to the number of $1,000 principal amount of Convertible Notes converted on such Conversion Date.
Free Convertibility Date:	February 1, 2018
Expiration Time:	The Valuation Time
Expiration Date:	August 1, 2018, subject to earlier exercise
Multiple Exercise:	Applicable, as described under "Automatic Exercise" below
Automatic Exercise:	Notwithstanding Section 3.4 of the Equity Definitions and subject to Section 9(h)(ii), on each Conversion Date in respect of which a "Notice of Conversion" (as defined in the Indenture) that is effective as to Counterparty has been delivered by the relevant converting Holder, a number of Options equal to [(i)] the number of Convertible Notes in denominations of USD 1,000 as to which such Conversion Date has occurred [minus (ii) the number of Options that are or are deemed to be automatically exercised on such Conversion Date under the Base Call Option Transaction Confirmation letter agreement dated August [__], 2013 between Dealer and Counterparty (the "Base Call Option Confirmation"),]9 shall be deemed to be automatically exercised; provided that such Options shall be exercised or deemed exercised only if Counterparty or the Trustee on behalf of Counterparty has provided a Notice of Exercise to Dealer in accordance with "Notice of Exercise" below.
	Notwithstanding the foregoing, in no event shall the number of Options that are exercised or deemed exercised hereunder exceed the Number of Options.
Notice of Exercise:	Notwithstanding anything to the contrary in the Equity Definitions or under "Automatic Exercise" above, in order to exercise any Options on any Conversion Date, Counterparty or the Trustee on behalf of Counterparty must notify Dealer in writing before 5:00 p.m. (New York City time) on the

__________________

⁹ Insert in the Additional Call Option Confirmation only.

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	Scheduled Valid Day immediately preceding the scheduled first day of the Settlement Averaging Period (the "Exercise Notice Deadline") for the Options being exercised of (i) the number of such Options (and the number of $1,000 principal amount of Notes being converted on such Conversion Date), (ii) the scheduled first day of the Settlement Averaging Period and the scheduled Settlement Date and (iii) if Counterparty elects a Settlement Method for such Options other than Net Share Settlement, such notice shall also include information, representations, acknowledgments and agreements required pursuant to "Settlement Method Election Conditions" below; provided that notwithstanding the foregoing, such notice (and the related exercise of Options) shall be effective if given after the Exercise Notice Deadline, but prior to 4:00 p.m. (New York City time) on the fifth Scheduled Valid Day following the Exercise Notice Deadline, in which event the Calculation Agent shall have the right to adjust the delivery obligation under this Confirmation as appropriate to reflect the reasonable additional costs (including, but not limited to, hedging mismatches and market losses) and reasonable expenses incurred by Dealer in connection with its hedging activities (including the unwinding of any hedge position) as a result of Dealer not having received such notice on or prior to the Exercise Notice Deadline and Dealer's obligation to make any payment or delivery in respect of such exercise shall not be extinguished; and provided further that in respect of any Options relating to Convertible Notes with a Conversion Date occurring on or after the Free Convertibility Date, (A) such notice may be given at any time before 5:00 p.m. (New York City time) on the Scheduled Valid Day immediately preceding the Expiration Date and need only specify the information required in clause (i) above, and (B) if the Settlement Method for such Options is not Net Share Settlement, Dealer shall have received a separate notice (the "Notice of Final Settlement Method") in respect of all such Convertible Notes before 5:00 p.m. (New York City time) on the Free Convertibility Date specifying the information required in clause (iii) above.
Valuation Time:	The close of trading of the regular trading session on the Exchange; provided that if the principal trading session is extended, the Calculation Agent shall determine the Valuation Time in its reasonable discretion.
Market Disruption Event:	Section 6.3(a) of the Equity Definitions is hereby replaced in its entirety by the following:
	"`Market Disruption Event' means (i) a failure by the primary U.S. national or regional securities exchange or market on which the Shares are listed or admitted for trading to open for trading during its regular trading session or (ii) the occurrence or existence prior to 1:00 p.m., New York City time, on any Scheduled Valid Day for the Shares for more than one half-hour period in the aggregate during regular trading hours of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits permitted by the relevant stock exchange or otherwise) in the Shares or in any options contracts or futures contracts relating to the Shares."

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Settlement Terms.
Settlement Method:	For any Option, Net Share Settlement; provided that Counterparty may elect Cash Settlement or Combination Settlement for such Option if the Settlement Method Election Conditions have been satisfied and Counterparty or the Trustee on behalf of Counterparty shall have notified Dealer of the Settlement Method in the Notice of Exercise or Notice of Final Settlement Method, as applicable, for such Option; provided further that if Counterparty has elected to settle its conversion obligations in respect of the related Convertible Notes (A) entirely in Shares pursuant to Section 14.02(a) of the Indenture (together with cash in lieu of fractional Shares) (such settlement method, "Settlement in Shares"), or (B)(x) in a combination of cash and Shares pursuant to Section 14.02(a) of the Indenture with a Specified Option Cash Amount (as defined below) less than USD 1,000 (such settlement method, "Low Cash Combination Settlement"), or (y) in a combination of cash and Shares pursuant to Section 14.02(a) of the Indenture with a Specified Option Cash Amount (as defined below) equal to USD 1,000, then, in each case, the relevant Settlement Method for such Option shall be Net Share Settlement.
Settlement Method Election Conditions:	In order to elect a Settlement Method other than Net Share Settlement for any Option, the Notice of Exercise or Notice of Final Settlement Method, as applicable, shall contain:
	(i) Counterparty's election of such other Settlement Method for the related Convertible Notes, which shall correspond to Counterparty's election under the Convertible Notes of whether it elects to settle its conversion obligations in respect of the related Convertible Notes:
	(A) in a combination of cash and Shares pursuant to Section 14.02(a) of the Indenture with a Specified Option Cash Amount (as defined below) greater than USD 1,000, in which case such other Settlement Method shall be Combination Settlement; or
	(B) entirely in cash pursuant to Section 14.02(a) of the Indenture, in which case such other Settlement Method shall be Cash Settlement;
	(ii) if such other Settlement Method is Combination Settlement, the fixed amount of cash per Convertible Note applicable to the settlement of each related Convertible Note (the "Specified Option Cash Amount");
	(iii) a representation that, on the date of such Notice of Exercise or Notice of Final Settlement Method, as applicable, Counterparty is not in possession of any material non-public information with respect to Counterparty or the Shares;

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	(iv) a representation that Counterparty is electing the Settlement Method for the related Convertible Note and such Settlement Method in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b-5 under the Securities Exchange Act of 1934, as amended (the "Exchange Act");
	(v) a representation that Counterparty has not entered into or altered any hedging transaction relating to the Shares corresponding to or offsetting the Transaction;
	(vi) a representation that Counterparty is not electing the Settlement Method for the related Convertible Note and such Settlement Method to create actual or apparent trading activity in the Shares (or any security convertible into or exchangeable for the Shares) or to manipulate the price of the Shares (or any security convertible into or exchangeable for the Shares); and
	(vii) an acknowledgment by Counterparty that (A) any transaction by Dealer following Counterparty's election of the Settlement Method for the related Convertible Note and such Settlement Method shall be made at Dealer's sole discretion and for Dealer's own account and (B) Counterparty does not have, and shall not attempt to exercise, any influence over how, when, whether or at what price to effect such transactions, including, without limitation, the price paid or received per Share pursuant to such transactions, or whether such transactions are made on any securities exchange or privately.
Net Share Settlement:	If Net Share Settlement is applicable to any Option exercised or deemed exercised hereunder, Dealer will deliver to Counterparty, on the relevant Settlement Date for each such Option, a number of Shares (the "Net Share Settlement Amount") equal to the sum, for each Valid Day during the Settlement Averaging Period for each such Option, of (i) (a) the Daily Option Value for such Valid Day, divided by (b) the Relevant Price on such Valid Day, divided by (ii) the number of Valid Days in the Settlement Averaging Period; provided that in no event shall the Net Share Settlement Amount for any Option exceed a number of Shares equal to the Applicable Limit for such Option divided by the Applicable Limit Price on the Settlement Date for such Option.
	Dealer will pay cash in lieu of delivering any fractional Shares to be delivered with respect to any Net Share Settlement Share Amount valued at the Relevant Price for the last Valid Day of the Settlement Averaging Period.

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Combination Settlement:	If Combination Settlement is applicable to any Option exercised or deemed exercised hereunder, Dealer will deliver to Counterparty, on the relevant Settlement Date for each such Option:
	(i) an amount of cash (the "Combination Settlement Cash Amount") equal to the sum, for each Valid Day during the Settlement Averaging Period for such Option, of (A) an amount (the "Daily Combination Settlement Cash Amount") equal to the lesser of (1) the product of (x) the Applicable Percentage and (y) the excess of (i) the Specified Option Cash Amount over (ii) USD 1,000 and (2) the Daily Option Value, divided by (B) the number of Valid Days in the Settlement Averaging Period; provided that if the calculation in clause (A) above results in zero or a negative number for any Valid Day, the Daily Combination Settlement Cash Amount for such Valid Day shall be deemed to be zero; and
	(ii) a number of Shares (the "Combination Settlement Share Amount") equal to the sum, for each Valid Day during the Settlement Averaging Period for such Option, of a number of Shares for such Valid Day (the "Daily Combination Settlement Share Amount") equal to (A) (1) the Daily Option Value on such Valid Day minus the Daily Combination Settlement Cash Amount for such Valid Day, divided by (2) the Relevant Price on such Valid Day, divided by (B) the number of Valid Days in the Settlement Averaging Period; provided that if the calculation in clause (A)(1) above results in zero or a negative number for any Valid Day, the Daily Combination Settlement Share Amount for such Valid Day shall be deemed to be zero;
	provided that in no event shall the sum of (x) the Combination Settlement Cash Amount for any Option and (y) the Combination Settlement Share Amount for such Option multiplied by the Applicable Limit Price on the Settlement Date for such Option exceed the Applicable Limit for such Option.
	Dealer will pay cash in lieu of delivering any fractional Shares to be delivered with respect to any Combination Settlement Share Amount valued at the Relevant Price for the last Valid Day of the Settlement Averaging Period.
Cash Settlement:	If Cash Settlement is applicable to any Option exercised or deemed exercised hereunder, in lieu of Section 8.1 of the Equity Definitions, Dealer will pay to Counterparty, on the relevant Settlement Date for each such Option, an amount of cash (the "Cash Settlement Amount") equal to the sum, for each Valid Day during the Settlement Averaging Period for such Option, of (i) the Daily Option Value for such Valid Day, divided by (ii) the number of Valid Days in the Settlement Averaging Period; provided that in no event shall the Cash Settlement Amount exceed the Applicable Limit for such Option.

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Daily Option Value:	For any Valid Day, an amount equal to (i) the Option Entitlement on such Valid Day, multiplied by (ii) the Relevant Price on such Valid Day less the Strike Price on such Valid Day; provided that if the calculation contained in clause (ii) above results in a negative number, the Daily Option Value for such Valid Day shall be deemed to be zero. In no event will the Daily Option Value be less than zero.
Applicable Limit:	For any Option, an amount of cash equal to the Applicable Percentage multiplied by the excess of (i) the aggregate of (A) the amount of cash, if any, delivered to the Holder of the related Convertible Note upon conversion of such Convertible Note and (B) the number of Shares, if any, delivered to the Holder of the related Convertible Note upon conversion of such Convertible Note multiplied by the Applicable Limit Price on the Settlement Date for such Option, over (ii) USD 1,000.
Applicable Limit Price:	On any day, the opening price as displayed under the heading "Op" on Bloomberg page "SREV <equity>" (or its equivalent successor if such page is not available).
Valid Day:	A day on which (i) there is no Market Disruption Event and (ii) trading in the Shares generally occurs on the Exchange or, if the Shares are not then listed on the Exchange, on the principal other U.S. national or regional securities exchange on which the Shares are then listed or, if the Shares are not then listed on a U.S. national or regional securities exchange, on the principal other market on which the Shares are then listed or admitted for trading. If the Shares are not so listed or admitted for trading, "Valid Day" means a Business Day.
Scheduled Valid Day:	A day that is scheduled to be a Valid Day on the principal U.S. national or regional securities exchange or market on which the Shares are listed or admitted for trading. If the Shares are not so listed or admitted for trading, "Scheduled Valid Day" means a Business Day.
Business Day:	Any day other than a Saturday, a Sunday or a day on which the Federal Reserve Bank of New York is authorized or required by law or executive order to close or be closed.
Relevant Price:	On any Valid Day, the per Share volume-weighted average price as displayed under the heading "Bloomberg VWAP" on Bloomberg page "SREV <equity> AQR" (or its equivalent successor if such page is not available) in respect of the period from the scheduled open of trading on the Exchange to the Scheduled Closing Time of the Exchange on such Valid Day (or if such volume-weighted average price is unavailable at such time, the market value of one Share on such Valid Day determined, by the Calculation Agent in good faith and in a reasonable manner (using a volume-weighted average method, if practicable)). The Relevant Price will be determined without regard to after-hours trading or any other trading outside of the regular trading session trading hours.

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Settlement Averaging Period:	For any Option and regardless of the Settlement Method applicable to such Option:
	(i) if the related Conversion Date occurs prior to the Free Convertibility Date, the 50 consecutive Valid Day period beginning on, and including, the second Valid Day after such Conversion Date; provided that if the Notice of Exercise for such Option specifies that Settlement in Shares or Low Cash Combination Settlement applies to the related Convertible Note, the Settlement Averaging Period shall be the 100 consecutive Valid Day period beginning on, and including, the second Valid Day after such Conversion Date; or
	(ii) if the related Conversion Date occurs on or after the Free Convertibility Date, the 50 consecutive Valid Day period beginning on, and including, the 52nd Scheduled Valid Day immediately preceding the Expiration Date; provided that if the Notice of Exercise or Notice of Final Settlement Method, as applicable, for such Option specifies that Settlement in Shares or Low Cash Combination Settlement applies to the related Convertible Note, the Settlement Averaging Period shall be the 100 consecutive Valid Days beginning on, and including, the 102nd Scheduled Valid Day immediately preceding the Expiration Date.
Settlement Date:	For any Option, the third Business Day immediately following the last Valid Day of the Settlement Averaging Period for such Option.
Settlement Currency:	USD
Other Applicable Provisions:	The provisions of Sections 9.1(c), 9.8, 9.9, 9.11 and 9.12 of the Equity Definitions will be applicable, except that all references in such provisions to "Physically-settled" shall be read as references to "Share Settled." "Share Settled" in relation to any Option means that Net Share Settlement or Combination Settlement is applicable to that Option.
Representation and Agreement:	Notwithstanding anything to the contrary in Equity Definitions (including, but not limited to, Section 9.11 thereof), the parties acknowledge that (i) any Shares delivered to Counterparty shall be, upon delivery, subject to restrictions and limitations arising from Counterparty's status as issuer of the Shares under applicable securities laws, (ii) Dealer may deliver any Shares required to be delivered hereunder in certificated form in lieu of delivery through the Clearance System and (iii) any Shares delivered to Counterparty may be "restricted securities" (as defined in Rule 144 under the Securities Act of 1933, as amended (the "Securities Act")).
3. Additional Terms applicable to the Transaction.
Adjustments applicable to the Transaction:

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Potential Adjustment Events:	Notwithstanding Section 11.2(e) of the Equity Definitions, a "Potential Adjustment Event" means an occurrence of any event or condition, as set forth in any Dilution Adjustment Provision, that would result in an adjustment under the Indenture to the "Conversion Rate" or the composition of a "unit of Reference Property" or to any "Last Reported Sale Price," "Daily VWAP," "Daily Conversion Value" or "Daily Settlement Amount" (each as defined in the Indenture). For the avoidance of doubt, Dealer shall not have any delivery or payment obligation hereunder, and no adjustment shall be made to the terms of the Transaction, on account of (x) any distribution of cash, property or securities by Counterparty to holders of the Convertible Notes (upon conversion or otherwise) or (y) any other transaction in which holders of the Convertible Notes are entitled to participate, in each case, in lieu of an adjustment under the Indenture of the type referred to in the immediately preceding sentence (including, without limitation, pursuant to the fourth sentence of Section 14.04(c) of the Indenture or the fourth sentence of Section 14.04(d) of the Indenture).
Method of Adjustment:	Calculation Agent Adjustment, which means that, notwithstanding Section 11.2(c) of the Equity Definitions, upon any Potential Adjustment Event, the Calculation Agent shall make a corresponding adjustment to any one or more of the Strike Price, Number of Options, Option Entitlement and any other variable relevant to the exercise, settlement or payment for the Transaction; provided that, notwithstanding the foregoing, if the Calculation Agent in good faith disagrees with any adjustment to the Convertible Notes that involves an exercise of discretion by Counterparty or its board of directors (including, without limitation, pursuant to Section 14.05 of the Indenture or in connection with any proportional adjustment or the determination of the fair value of any securities, property, rights or other assets) and determines that such adjustment was materially inaccurate or based on materially inaccurate inputs, then in each such case, the Calculation Agent will determine the adjustment to be made to any one or more of the Strike Price, Number of Options, Option Entitlement and any other variable relevant to the exercise, settlement or payment for the Transaction in a commercially reasonable manner; provided further that, notwithstanding the foregoing, if any Potential Adjustment Event occurs during the Settlement Averaging Period but no adjustment was made to any Convertible Note under the Indenture because the relevant Holder (as such term is defined in the Indenture) was deemed to be a record owner of the underlying Shares on the related Conversion Date, then the Calculation Agent shall make an adjustment, as determined by it, to the terms hereof in order to account for such Potential Adjustment Event.
Dilution Adjustment Provisions:	Sections 14.04(a), 14.04(b), 14.04(c), 14.04(d) and 14.04(e) and Section 14.05 of the Indenture.

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Extraordinary Events applicable to the Transaction:
Merger Events:	Applicable; provided that notwithstanding Section 12.1(b) of the Equity Definitions, a "Merger Event" means the occurrence of any event or condition set forth in the definition of "Merger Event" in Section 14.07(a) of the Indenture.
Tender Offers:	Applicable; provided that notwithstanding Section 12.1(d) of the Equity Definitions, a "Tender Offer" means the occurrence of any event or condition set forth in Section 14.04(e) of the Indenture.
Consequence of Merger Events /
Tender Offers:	Notwithstanding Section 12.2 and Section 12.3 of the Equity Definitions, upon the occurrence of a Merger Event or a Tender Offer, the Calculation Agent shall make a corresponding adjustment in respect of any adjustment under the Indenture to any one or more of the nature of the Shares (in the case of a Merger Event), Strike Price, Number of Options, Option Entitlement and any other variable relevant to the exercise, settlement or payment for the Transaction; provided, however, that such adjustment shall be made without regard to any adjustment to the Conversion Rate pursuant to any Excluded Provision; provided further that if, with respect to a Merger Event or a Tender Offer, (i) the consideration for the Shares includes (or, at the option of a holder of Shares, may include) shares of an entity or person that is not a corporation or is not organized under the laws of the United States, any State thereof or the District of Columbia or (ii) Counterparty to the Transaction following such Merger Event or Tender Offer will not be a corporation or will not be the Issuer following such Merger Event or Tender Offer, then Dealer, in its sole discretion, may elect for Cancellation and Payment (Calculation Agent Determination) to apply.
Nationalization, Insolvency or Delisting:	Cancellation and Payment (Calculation Agent Determination); provided that, in addition to the provisions of Section 12.6(a)(iii) of the Equity Definitions, it will also constitute a Delisting if the Exchange is located in the United States and the Shares are not immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or their respective successors); if the Shares are immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or their respective successors), such exchange or quotation system shall thereafter be deemed to be the Exchange.
Additional Disruption Events:
Change in Law:	Applicable; provided that (i) Section 12.9(a)(ii) of the Equity Definitions is hereby amended by replacing the parenthetical beginning after the word "regulation" in the second line thereof with the words "(including, for the avoidance of doubt and without limitation, (x) any tax law or (y) adoption or promulgation of new regulations authorized or mandated by existing statute)," and (ii) Section 12.9(a)(ii)(X) of the Equity Definitions is hereby amended by replacing the word "Shares" with the phrase "Hedge Positions".

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Failure to Deliver:	Applicable
Hedging Disruption:	Applicable; provided that:
	(i) Section 12.9(a)(v) of the Equity Definitions is hereby amended by (a) inserting the following words at the end of clause (A) thereof: "in the manner contemplated by the Hedging Party on the Trade Date" and (b) inserting the following two phrases at the end of such Section:
	"For the avoidance of doubt, the term "equity price risk" shall be deemed to include, but shall not be limited to, stock price and volatility risk. And, for the further avoidance of doubt, any such transactions or assets referred to in phrases (A) or (B) above must be available on commercially reasonable pricing terms."; and
	(ii) Section 12.9(b)(iii) of the Equity Definitions is hereby amended by inserting in the third line thereof, after the words "to terminate the Transaction", the words "or a portion of the Transaction affected by such Hedging Disruption".
Increased Cost of Hedging:	Not Applicable
Hedging Party:	For all applicable Additional Disruption Events, Dealer.
Determining Party:	For all applicable Extraordinary Events, Dealer.
Non-Reliance:	Applicable
Agreements and Acknowledgments
Regarding Hedging Activities:	Applicable
Additional Acknowledgments:	Applicable
4. Calculation Agent.	Dealer. All calculations and determinations by the Calculation Agent shall be made in good faith and in a commercially reasonable manner. Following any calculation by the Calculation Agent hereunder, upon a prior written request by Counterparty, the Calculation Agent will provide to Counterparty by email to the email address provided by Counterparty in such prior written request a report (in a commonly used file format for the storage and manipulation of financial data) displaying in reasonable detail the basis for such calculation; provided, however, that in no event will Dealer be obligated to share with Counterparty any proprietary or confidential data or information or any proprietary models used by it.

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5. Account Details.

1. Account for payments to Counterparty:

Bank: [___]

[___]
[___]
ABA#: [___]
SWIFT: [___]
Acct Name: [___]
Acct No.: [___]

Account for delivery of Shares to Counterparty:

To be provided by Counterparty.

2. Account for payments to Dealer:

Bank: [___]

[___]
[___]
ABA#: [___]
SWIFT: [___]
Acct Name: [___]
Acct No.: [___]

Account for delivery of Shares from Dealer:

To be provided by Dealer.

6. Offices.
1. The Office of Counterparty for the Transaction is: Inapplicable, Counterparty is not a Multibranch Party.
2. The Office of Dealer for the Transaction is: [____]

[________]

[________]

[________]

 

7. Notices.
1. Address for notices or communications to Counterparty:

To: ServiceSource International, Inc.
▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇
▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇

Attention: [___]

Telephone: [___]

Facsimile: [___]

2. Address for notices or communications to Dealer:

To: [___]

[___]

[___]

Attention: [___]

Telephone: [___]

Facsimile: [___]
Email: [___]

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With a copy to: [___]

[___]

[___]

Attention: [___]

Telephone: [___]

Facsimile: [___]

Email: [___]

8. Representations and Warranties of Counterparty.

Each of the representations and warranties of Counterparty set forth in Section 1 of the Purchase Agreement (the "Purchase Agreement"), dated as of August [__], 2013, between Counterparty and ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ & Co. LLC, as representative of the Initial Purchasers party thereto (the "Representative"), are true and correct and are hereby deemed to be repeated to Dealer as if set forth herein. Counterparty hereby further represents and warrants to Dealer on the date hereof and on and as of the Premium Payment Date that:

1. Counterparty has all necessary corporate power and authority to execute, deliver and perform its obligations in respect of the Transaction; such execution, delivery and performance have been duly authorized by all necessary corporate action on Counterparty's part; and this Confirmation has been duly and validly executed and delivered by Counterparty and constitutes its valid and binding obligation, enforceable against Counterparty in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws affecting creditors' rights and remedies generally, and subject, as to enforceability, to general principles of equity, including principles of commercial reasonableness, good faith and fair dealing (regardless of whether enforcement is sought in a proceeding at law or in equity) and except that rights to indemnification and contribution hereunder may be limited by federal or state securities laws or public policy relating thereto.
2. Neither the execution and delivery of this Confirmation nor the incurrence or performance of obligations of Counterparty hereunder will conflict with or result in a breach of the certificate of incorporation or by-laws (or any equivalent documents) of Counterparty, or any applicable law or regulation, or any order, writ, injunction or decree of any court or governmental authority or agency, or any agreement or instrument to which Counterparty or any of its subsidiaries is a party or by which Counterparty or any of its subsidiaries is bound or to which Counterparty or any of its subsidiaries is subject, or constitute a default under, or result in the creation of any lien under, any such agreement or instrument.
3. No consent, approval, authorization, or order of, or filing with, any governmental agency or body or any court is required in connection with the execution, delivery or performance by Counterparty of this Confirmation, except such as have been obtained or made and such as may be required under the Securities Act or state securities laws.
4. Counterparty is not and, after consummation of the transactions contemplated hereby, will not be required to register as an "investment company" as such term is defined in the Investment Company Act of 1940, as amended.
5. Counterparty is an "eligible contract participant" (as such term is defined in Section 1a(18) of the Commodity Exchange Act, as amended).
6. Counterparty and each of its affiliates is not, on the date hereof, in possession of any material non-public information with respect to Counterparty or the Shares.

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7. No state or local (including any non-U.S. jurisdiction's) law, rule, regulation or regulatory order applicable to the Shares would give rise to any reporting, consent, registration or other requirement (including without limitation a requirement to obtain prior approval from any person or entity) as a result of Dealer or its affiliates owning or holding (however defined) Shares.
8. Counterparty (A) is capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities, (B) will exercise independent judgment in evaluating the recommendations of any broker-dealer or its associated persons, unless it has otherwise notified the broker-dealer in writing and (C) has total assets of at least $50 million.

9. Other Provisions.

1. Opinions. Counterparty shall deliver to Dealer an opinion of counsel, dated as of the Trade Date, with respect to the due incorporation, existence and good standing of Counterparty in Delaware, the due authorization, execution and delivery of this Confirmation, and, in respect of the execution, delivery and performance of this Confirmation, the absence of any conflict with or breach of any material agreement required to be filed as an exhibit to Counterparty's Annual Report on Form 10-K, Counterparty's certificate of incorporation or Counterparty's by-laws. Delivery of such opinion to Dealer shall be a condition precedent for the purpose of Section 2(a)(iii) of the Agreement with respect to each obligation of Dealer under Section 2(a)(i) of the Agreement.
2. Repurchase Notices. Counterparty shall, on any day on which Counterparty effects any repurchase of Shares or consummates or otherwise executes or engages in any transaction or event (a "Conversion Rate Adjustment Event") that would lead to an increase in the Conversion Rate (as such term is defined in the Indenture), promptly give Dealer a written notice of such repurchase or Conversion Rate Adjustment Event (a "Repurchase Notice") on such day if following such repurchase or Conversion Rate Adjustment Event, as the case may be, the number of outstanding Shares as determined on such day is (i) less than [__]¹⁰ million (in the case of the first such notice) or (ii) thereafter more than [__]¹¹ million less than the number of Shares included in the immediately preceding Repurchase Notice. Counterparty agrees to indemnify and hold harmless Dealer and its affiliates and their respective officers, directors, employees, affiliates, advisors, agents and controlling persons (each, an "Indemnified Person") from and against any and all losses (including losses relating to Dealer's hedging activities as a consequence of becoming, or of the risk of becoming, a Section 16 "insider", including without limitation, any forbearance from hedging activities or cessation of hedging activities and any losses in connection therewith with respect to the Transaction), claims, damages, judgments, liabilities and expenses (including reasonable attorney's fees), joint or several, which an Indemnified Person may become subject to, as a result of Counterparty's failure to provide Dealer with a Repurchase Notice on the day and in the manner specified in this paragraph, and to reimburse, within 30 days, upon written request, each of such Indemnified Persons for any reasonable and documented legal or other expenses incurred in connection with investigating, preparing for, providing testimony or other evidence in connection with or defending any of the foregoing. If any suit, action, proceeding (including any governmental or regulatory investigation), claim or demand shall be brought or asserted against the Indemnified Person as a result of Counterparty's failure to provide Dealer with a Repurchase Notice in accordance with this paragraph, such Indemnified Person shall promptly notify Counterparty in writing, and Counterparty, upon request of the Indemnified Person, shall

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   ¹⁰ To be the number of Shares outstanding that would cause Dealer's current position in the shares underlying the Transaction (including the number of Shares underlying any additional transaction if the greenshoe is exercised in full, and any Shares under pre-existing call option transactions with Counterparty) to increase by 0.5%.
   ¹¹ To be the number of Shares that, if repurchased, would cause Dealer's current position in the shares underlying the Transaction (including the number of Shares underlying any additional transaction if the greenshoe is exercised in full, and any Shares under pre-existing call option transactions with Counterparty) to increase by a further 0.5% from the threshold for the first Repurchase Notice.

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Entitlement and (2) the aggregate number of Shares underlying any other call option transaction sold by Dealer to Counterparty, and (B) the denominator of which is the number of Shares outstanding. The "Share Amount" as of any day is the number of Shares that Dealer and any person whose ownership position would be aggregated with that of Dealer (Dealer or any such person, a "Dealer Person") under any law, rule, regulation, regulatory order or organizational documents or contracts of Counterparty that are, in each case, applicable to ownership of Shares ("Applicable Restrictions"), owns, beneficially owns, constructively owns, controls, holds the power to vote or otherwise meets a relevant definition of ownership under any Applicable Restriction, as determined by Dealer in its reasonable discretion. The "Applicable Share Limit" means a number of Shares equal to (A) the minimum number of Shares that could give rise to reporting or registration obligations or other requirements (including obtaining prior approval from any person or entity) of a Dealer Person, or could result in an adverse effect on a Dealer Person, under any Applicable Restriction, as determined by Dealer in its reasonable discretion, minus (B) 1% of the number of Shares outstanding.

3. Notwithstanding any other provision in this Confirmation to the contrary requiring or allowing Dealer to purchase, sell, receive or deliver any Shares or other securities, or make or receive any payment in cash, to or from Counterparty, Dealer may designate any of its affiliates to purchase, sell, receive or deliver such Shares or other securities, or to make or receive such payment in cash, and otherwise to perform Dealer's obligations in respect of the Transaction and any such designee may assume such obligations. Dealer shall be discharged of its obligations to Counterparty only to the extent of any such performance.

6. Staggered Settlement. If upon advice of counsel with respect to applicable legal and regulatory requirements, including any requirements relating to Dealer's hedging activities hereunder, Dealer reasonably determines that it would not be practicable or advisable to deliver, or to acquire Shares to deliver, any or all of the Shares to be delivered by Dealer on any Settlement Date for the Transaction, Dealer may, by notice to Counterparty on or prior to any Settlement Date (a "Nominal Settlement Date"), elect to deliver the Shares on two or more dates (each, a "Staggered Settlement Date") as follows:

1. in such notice, Dealer will specify to Counterparty the related Staggered Settlement Dates (the first of which will be such Nominal Settlement Date and the last of which will be no later than the twentieth (20th) Exchange Business Day following such Nominal Settlement Date) and the number of Shares that it will deliver on each Staggered Settlement Date;
2. the aggregate number of Shares that Dealer will deliver to Counterparty hereunder on all such Staggered Settlement Dates will equal the number of Shares that Dealer would otherwise be required to deliver on such Nominal Settlement Date; and
3. if the Net Share Settlement or Combination Settlement terms set forth above were to apply to the Nominal Settlement Date, then the Net Share Settlement or Combination Settlement terms will apply on each Staggered Settlement Date, except that the number of Shares deliverable pursuant to such terms will be allocated among such Staggered Settlement Dates as specified by Dealer in the notice referred to in clause (i) above.

7. Role of Agent. [Insert relevant Dealer agency language.]

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8. Additional Termination Events.

1. Notwithstanding anything to the contrary in this Confirmation if an event of default with respect to Counterparty occurs under the terms of the Convertible Notes as set forth in Section 6.01 of the Indenture, then such event of default shall constitute an Additional Termination Event applicable to the Transaction and, with respect to such Additional Termination Event, (A) Counterparty shall be deemed to be the sole Affected Party, (B) the Transaction shall be the sole Affected Transaction and (C) Dealer shall be the party entitled to designate an Early Termination Date pursuant to Section 6(b) of the Agreement.
2. Notwithstanding anything to the contrary in this Confirmation, the receipt by Dealer from Counterparty, within the applicable time period set forth opposite "Notice of Exercise" in Section 2, of any Notice of Exercise in respect of Options that relate to Convertible Notes as to which additional Shares would be added to the Conversion Rate (as defined in the Indenture) pursuant to Section 14.03 of the Indenture in connection with a "Make-Whole Fundamental Change" (as defined in the Indenture) shall constitute an Additional Termination Event as provided in this Section 7(h)(ii).  Upon receipt of any such Notice of Exercise, Dealer shall designate an Exchange Business Day following such Additional Termination Event (which Exchange Business Day shall in no event be earlier than the related settlement date for such Convertible Notes) as an Early Termination Date with respect to the portion of the Transaction corresponding to a number of Options (the "Make-Whole Conversion Options") equal to the lesser of (A) the number of such Options specified in such Notice of Exercise [minus the number of "Make-Whole Conversion Options" (as defined in the Base Call Option Confirmation), if any, that relate to such Convertible Notes]¹² and (B) the Number of Options as of the date Dealer designates such Early Termination Date and, as of such date, the Number of Options shall be reduced by the number of Make-Whole Conversion Options.  Any payment hereunder with respect to such termination (the "Make-Whole Unwind Payment") shall be calculated pursuant to Section 6 of the Agreement as if (1) an Early Termination Date had been designated in respect of a Transaction having terms identical to the Transaction and a Number of Options equal to the number of Make-Whole Conversion Options, (2) Counterparty were the sole Affected Party with respect to such Additional Termination Event and (3) the terminated portion of the Transaction were the sole Affected Transaction (and, for the avoidance of doubt, in determining the amount payable pursuant to Section 6 of the Agreement, the Calculation Agent shall not take into account any adjustments to the Option Entitlement that result from corresponding adjustments to the Conversion Rate (as defined in the Indenture) pursuant to Section 14.03 of the Indenture); provided that the amount of cash deliverable in respect of such early termination by Dealer to Counterparty shall not be greater than the product of (x) the Applicable Percentage and (y) the excess of (I) (1) the number of Make-Whole Conversion Options multiplied by (2) the Conversion Rate (as defined in the Indenture, and after taking into account any applicable adjustments to the Conversion Rate pursuant to Section 14.03 of the Indenture) multiplied by (3) a market price per Share determined by the Calculation Agent in a commercially reasonable manner over (II) the aggregate principal amount of such Convertible Notes, as determined by the Calculation Agent in a commercially reasonable manner. Counterparty may irrevocably elect in the relevant Notice of Exercise to receive any Make-Whole Unwind Payment in Shares, in which case, in lieu of making such Make-Whole Unwind Payment as set forth above, Dealer shall deliver to Counterparty, within a commercially reasonable period of time after such designation as determined by Dealer (taking into account existing liquidity conditions and Dealer's hedging and hedge unwind activity or settlement activity in connection with such delivery) a number of Shares equal to (A) such Make-Whole Unwind Payment, divided by (B) a price per Share determined by the Calculation Agent in good faith and in a commercially reasonable manner; provided that Counterparty may elect to receive a Make-Whole Unwind Payment in Shares only if Counterparty represents and warrants to Dealer in writing on the date of such election that Counterparty is not in possession of any material non-public information regarding Counterparty or the Shares.

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¹² Insert in Additional Call Option Confirmation only.

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9. Amendments to Equity Definitions.

1. Section 12.6(a)(ii) of the Equity Definitions is hereby amended by (1) deleting from the fourth line thereof the word "or" after the word "official" and inserting a comma therefor, and (2) deleting the semi-colon at the end of subsection (B) thereof and inserting the following words therefor "or (C) at Dealer's option, the occurrence of any of the events specified in Section 5(a)(vii)(1) through (9) of the ISDA Master Agreement with respect to that Issuer."
2. Section 12.9(b)(i) of the Equity Definitions is hereby amended by (1) replacing "either party may elect" with "Dealer may elect" and (2) replacing "notice to the other party" with "notice to Counterparty" in the first sentence of such section.

10. No Setoff. Neither party shall have the right to set off any obligation that it may have to the other party under the Transaction against any obligation such other party may have to it, whether arising under the Agreement, this Confirmation or any other agreement between the parties hereto, by operation of law or otherwise.
11. Alternative Calculations and Payment on Early Termination and on Certain Extraordinary Events. If in respect of the Transaction, an amount is payable by Dealer to Counterparty (i) pursuant to Section 12.7 or Section 12.9 of the Equity Definitions or (ii) pursuant to Section 6(d)(ii) of the Agreement (any such amount, a "Payment Obligation"), Dealer shall satisfy the Payment Obligation by the Share Termination Alternative (as defined below), unless (a) Counterparty gives irrevocable telephonic notice to Dealer, confirmed in writing within one Scheduled Trading Day, no later than 12:00 p.m. (New York City time) on the Merger Date, the Tender Offer Date, the Announcement Date (in the case of Nationalization, Insolvency or Delisting), the Early Termination Date or date of cancellation, as applicable, of its election that the Share Termination Alternative shall not apply, (b) Counterparty remakes the representation set forth in Section 6(f) as of the date of such election and (c) Dealer agrees, in its sole discretion, to such election, in which case the provisions of Section 12.7 or Section 12.9 of the Equity Definitions, or the provisions of Section 6(d)(ii) of the Agreement, as the case may be, shall apply.

Share Termination Alternative:

If applicable, Dealer shall deliver to Counterparty the Share Termination Delivery Property on, or within a commercially reasonable period of time after, the date when the relevant Payment Obligation would otherwise be due pursuant to Section 12.7 or 12.9 of the Equity Definitions or Section 6(d)(ii) and 6(e) of the Agreement, as applicable (the "Share Termination Payment Date"), in satisfaction of such Payment Obligation in the manner reasonably requested by Counterparty free of payment.

Share Termination Delivery Property:

A number of Share Termination Delivery Units, as calculated by the Calculation Agent, equal to the Payment Obligation divided by the Share Termination Unit Price. The Calculation Agent shall adjust the Share Termination Delivery Property by replacing any fractional portion of a security therein with an amount of cash equal to the value of such fractional security based on the values used to calculate the Share Termination Unit Price.

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Share Termination Unit Price:	The value to Dealer of property contained in one Share Termination Delivery Unit, as determined by the Calculation Agent in its discretion by commercially reasonable means and notified by the Calculation Agent to Dealer at the time of notification of the Payment Obligation. For the avoidance of doubt, the parties agree that in determining the Share Termination Unit Price the Calculation Agent may consider the purchase price paid in connection with the purchase of Share Termination Delivery Property.
Share Termination Delivery Unit:	One Share or, if a Nationalization, Insolvency or Merger Event has occurred and a corresponding adjustment to the Transaction has been made, a unit consisting of the type and amount of such property received by a holder of one Share (without consideration of any requirement to pay cash or other consideration in lieu of fractional amounts of any securities) in such Nationalization, Insolvency or Merger Event, as determined by the Calculation Agent.
Failure to Deliver:	Applicable
Other applicable provisions:	If Share Termination Alternative is applicable, the provisions of Sections 9.8, 9.9 and 9.11 (as modified above) of the Equity Definitions and the provisions set forth opposite the caption "Representation and Agreement" in Section 2 will be applicable, except that all references to "Physically-settled" shall be read as references to "Share Termination Settled" and all references to "Shares" shall be read as references to "Share Termination Delivery Units." "Share Termination Settled" in relation to the Transaction means that the Share Termination Alternative is applicable to the Transaction.

12. Waiver of Jury Trial. Each party waives, to the fullest extent permitted by applicable law, any right it may have to a trial by jury in respect of any suit, action or proceeding relating to the Transaction. Each party (i) certifies that no representative, agent or attorney of either party has represented, expressly or otherwise, that such other party would not, in the event of such a suit, action or proceeding, seek to enforce the foregoing waiver and (ii) acknowledges that it and the other party have been induced to enter into the Transaction, as applicable, by, among other things, the mutual waivers and certifications provided herein.
13. Registration. Counterparty hereby agrees that if, in the good faith reasonable judgment of Dealer based on the advice of counsel, the Shares ("Hedge Shares") acquired by Dealer for the purpose of hedging its obligations pursuant to the Transaction cannot be sold in the public market by Dealer without registration under the Securities Act, Counterparty shall, at its election, either (i) in order to allow Dealer to sell the Hedge Shares in a registered offering, make available to Dealer an effective registration statement under the Securities Act and enter into an agreement, in customary form and substance reasonably satisfactory to Dealer, substantially in the form of an underwriting agreement for a registered secondary offering of equity securities of companies comparable in size, maturity and line of business; provided, however, that if Dealer, in its sole reasonable discretion, is not satisfied with access to due diligence materials, the results of its due diligence investigation, or the procedures and documentation for the registered offering referred to above, then clause (ii) or clause (iii) of this paragraph shall apply at the election of Counterparty, (ii) in order to allow Dealer to sell the Hedge Shares in a private placement, enter into a private placement agreement substantially similar to private placement purchase agreements customary for private placements of equity securities of companies comparable in size, maturity and line of business, in customary form and substance reasonably satisfactory to Dealer (in which case, the Calculation Agent shall make any adjustments to the terms of the Transaction that are necessary,