Read/Write Web writes: "Google makes $1 per internet user. But not all of the revenues come from Google Search - they control only 50% of the search market, but the whole web is organically getting covered by Google ads via AdSense and AdWords. Therefore, even if you perform your searches from Yahoo or Live, you may end up being directed to a long tail web page powered by Google AdSense. Another way to look at it - if you use Google as your favourite search engine, you may be giving them $2 per month. But even if you you use a different search engine, you may still give ~$0.5 via Adsense and the Long Tail."

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