Зачем Википедии $7.5M USD ???

Деньги на обслуживание серверов, платить людям которые работают, улучшать википедию.

цитата "На что пойдут мои деньги? На персонал и технологии. Хотя Википедия и входит в пятёрку самых посещаемых сайтов мира, у нас менее 30-ти штатных сотрудников. "

http://wikimediafoundation.org/wiki/FAQ/en
Where does my money go?

To people and technology. Even though Wikipedia and its sister projects are one of the top five most-visited websites in the world, we employ fewer than 35 people; see our staff overview. Roughly half work on technology, a small team supports our public outreach and volunteer cultivation activities, and the remaining staff work in fundraising and administration. In addition, your support helps to pay for the technology infrastructure (servers and bandwidth) that keep Wikipedia running and growing.

Fundamentally, the Wikimedia Foundation exists to support and grow the enormous network of volunteers who write and edit Wikipedia and its sister projects -- more than 100,000 people around the world.

там же
For the fiscal year beginning July 1, 2009 and ending June 30, 2010, we have budgeted $9.4 million in expenses, and an annual operating reserve of $1.2 million. We are hoping to raise $10.6 million throughout the fiscal year, and at least $7.5 million through our campaign.

We plan to raise the remaining revenue through our other fundraising activities throughout the fiscal year (including major gifts and foundation support) and through mission-friendly business development activities (such as licensing the Wikipedia name and logo for commercial uses).

More details about our finances can be found in our financial reports. Here is our 2009-10 Plan (PDF), and here is the Questions and Answers page related to it.

http://wikimediafoundation.org/wiki/FAQ/en
Здесь все написано. К сожалению русской версии нет.