Exhibit 10.18(F)

Execution Version

THIRD AMENDMENT TO

SEARCH AND ADVERTISING SERVICES AND SALES AGREEMENT

This Third Amendment to Search and Advertising Services and Sales Agreement
(this “Third Amendment”) is entered into to be effective as of March 31, 2011
(“Third Amendment Effective Date”) by and between Yahoo! Inc., a Delaware
corporation (“Yahoo!”) and Microsoft Corporation, a Washington corporation
(“Microsoft”).

WHEREAS, Yahoo! and Microsoft are parties to that certain Search and Advertising
Services and Sales Agreement, entered into as of December 4, 2009, as amended
(collectively, the “Agreement”); and

WHEREAS, Yahoo! and Microsoft desire to further amend the Agreement as set forth
herein.

NOW, THEREFORE, in consideration of the mutual promises contained herein, the
parties agree as follows:

1. Definitions. Capitalized terms used but not defined herein have the same
meanings given in the Agreement.

2. Guarantee Calculation.

(a) Sections 9.1.4(a)(3) to 9.1.4(a)(5) of the Agreement are hereby deleted and
replaced with the following:

“(3) [*].

(4) [*].

(5) [*].”

(b) Section 9.1.4(d) is deleted and replaced with the following:

“[*].”

(c) The following table replaces the table set forth in Section 6(e) of the
Second Amendment to the Agreement and provides 4 illustrative calculations:

 

Confidential   -1-  

 

 

[*] Indicates that certain information in this exhibit has been omitted and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to omitted portions.

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Execution Version

 

[*]

                                           

Example 1

   [*]                      [*]                      [*]                     
[*]                      [*]              [*]                

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]*

   $[*]      $[*]      $[*]      $[*]            

[*]*

   $[*]      $[*]      $[*]      $[*]           $[*]

[*]*

   N/A      N/A      N/A      N/A                

Example 2

   [*]      [*]      [*]      [*]      [*]      [*]

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]*

   $[*]      $[*]      $[*]      $[*]            

[*]*

   N/A      N/A      N/A      N/A           $[*]

[*]*

   $[*]      $[*]      $[*]      $[*]                

Example 3

   [*]      [*]      [*]      [*]      [*]      [*]

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]*

   $[*]      $[*]      $[*]      $[*]            

[*]*

   $[*]      $[*]      N/A      N/A           $[*]

[*]*

   N/A      N/A      N/A      $[*]                

Example 4

   [*]      [*]      [*]      [*]      [*]      [*]

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]

   $[*]      $[*]      $[*]      $[*]      $[*]       

[*]*

   $[*]      $[*]      $[*]      $[*]            

[*]*

   $[*]      N/A      $[*]      N/A           $[*]

[*]*

   N/A      $[*]      N/A      N/A                

*[*]

                                       

(d) Section 9.2.3(b) of the Agreement will be deleted and replaced with the
following:

“(b) Guarantee Payments. Payments or refunds required to be paid pursuant to
Section 9.1.4 (Guarantee), subject to any offsets permitted pursuant to Sections
9.1.4(b)(2) and 9.1.4(b)(3), shall be paid (or offset) within [*] after the last
day of each calendar month for True-Up Periods that ended during such month.”

 

Confidential   -2-  

 

 

[*] Indicates that certain information in this exhibit has been omitted and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to omitted portions.

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Execution Version

 

(e) Section 2 of Exhibit E will be deleted and replaced with the following:

“2. True-Up Periods. For the [*], there will be [*] consecutive ‘True-Up
Periods’ comprised of [*]. For all other [*], there will be [*] consecutive
“True-Up Periods” of [*] each starting on the Initial Implementation Date in
such country. The “Guarantee Term” for each country refers collectively to all
of its True-Up Periods.”

(f) The first sentence of Section 3.1(a)(1)(B) of Exhibit E is amended by
deleting the first sentence and replacing it with the following:

“‘GDP Adjustment’ is equal to [*] plus the percentage change in nominal
GDP/capita from the Reference Period to the corresponding True-Up Period in that
country, except for the [*] True-Up Period ([*] True-Up Periods in the [*]),
where the GDP Adjustment is measured as the change in nominal GDP/capita from
the first ([*] for the [*]) Reference Period (the start and end dates of which
are [*] preceding the True-Up Period) to the [*] True-Up Period in that country
([*] True-Up Periods in the [*]).”

(g) Section 3.1(a)(1)(C) of Exhibit E will be deleted and replaced with the
following:

“(C) Further, [*], for each True-Up Period, the version of the data to use shall
be the most current version of quarterly data available as of the end of each
True-Up Period. There will be no subsequent retroactive revisions to the GDP
Data for any True-Up Period for the [*]. For [*], the version of the data to use
shall be the most current version of quarterly data available as of the end of
each True-Up Period, and subject to retroactive revision in the subsequent
True-Up Periods for the country until the [*] and final True-Up Period at which
time no further revision shall be undertaken. If quarterly data for a country is
not reported or available, semi-annual data shall be used, or if semi-annual
data is not available, then the annual version shall be used.”

3. Miscellaneous. This Third Amendment will be governed and construed, to the
extent applicable, in accordance with the laws of the State of New York, without
regard to its conflict of law principles. This Third Amendment may be executed
in multiple counterparts, each of which shall be deemed an original and all of
which shall constitute one and the same instrument. This Third Amendment may be
amended or modified only by a written agreement that (a) refers to this Third
Amendment; and (b) is executed by an authorized representative of each party.
This Third Amendment shall be binding on the parties hereto and their respective
personal and legal representatives, successors, and permitted assigns. Except as
expressly set forth herein, the Agreement remains in full force and effect and
this Third Amendment shall not be construed to alter, amend or change any of the
other terms or conditions set forth in the Agreement. To the extent of any
conflict between this Third Amendment and any provisions of the Agreement, this
Third Amendment shall control with respect to the subject matter hereof.

 

Confidential   -3-  

 

 

[*] Indicates that certain information in this exhibit has been omitted and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to omitted portions.

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Execution Version

 

IN WITNESS WHEREOF, the parties by their duly authorized representatives have
executed this Third Amendment as of the Third Amendment Effective Date.

 

YAHOO! INC.     MICROSOFT CORPORATION By:    /s/ Mark Morrissey     By:   /s/
Greg Nelson Name:    Mark Morrissey     Name:   Greg Nelson Title:    Senior
Vice President     Title:   General Manager

 

Confidential   -4-  

 

 

[*] Indicates that certain information in this exhibit has been omitted and
filed separately with the Securities and Exchange Commission. Confidential
treatment has been requested with respect to omitted portions.