This excerpt taken from the ATVI 10-Q filed Feb 8, 2006.
Xbox 360 Live Incentive Program
To encourage Publisher to support functionality for Xbox Live in its Xbox 360 Software Titles and to drive increased usage of Xbox Live via Xbox 360, Publisher may qualify for certain payments based on the amount of Xbox Live Market Share (defined in Section 2.a. of this Exhibit 7 below) created by Publishers Multiplayer Software Titles (defined in Section 2.c. of this Exhibit 7 below). Each Accounting Period (defined in Section 3.c. of this exhibit below), Microsoft will calculate Publishers Xbox Live Market Share. If it is above [*] then Microsoft will pay Publisher an amount [*] The basic equation for calculating the Publishers payment under this program is:
The following sections define the elements of this basic equation.
Notwithstanding anything herein to the contrary, use of or revenue derived from online games for which an end user pays a subscription separate from any account established for basic use of Xbox Live, are excluded from this Xbox 360 Live Incentive Program.