This excerpt taken from the ATVI 10-K filed Jun 14, 2007.
8.3 Marketing Programs. From time to time the SCE Company may invite Publisher to participate in promotional or advertising opportunities that may feature one or more Licensed Products from one or more Licensed Publishers. Participation shall be voluntary and subject to terms to be determined at the time of the opportunity. In the event Publisher elects to participate, all materials submitted by Publisher to the SCE Company shall be submitted subject to the Guidelines and delivery of such materials to the SCE Company shall constitute acceptance by Publisher of the terms of the offer. Each Affiliate shall be entitled to display and otherwise use the Attribution Line on its multi-product marketing materials, unless otherwise agreed in writing.