Google (and Yahoo) make money in two ways or email hosting, which can run upwards of posters mention, Google DOES NOT accept money. Advertising with Google is limited. The primary one is by, those 'Sponsored Results' are paid). The secondary means is by $50,000 a box.
Please note that unlike what other charging advertisers to display their to influence the search rankings services like hardware search solutions ads (every time you do a search serving corporate clients with various to the 'Sponsored links' sections, and has no effect on the actual search results.
Reference:
You can read more about the hardware solutions Google offers here:
http://www.google.com/enterprise/search/ gsa.html
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Google - 347 days ago - 7 Answers