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Google Answers appears.
Google hired more than 500 'carefully screened' researchers 'ready to answer your question for as little as $2.50 -- usually within 24 hours'.
The online knowledge market allowed users to post bounties for well researched answers to their queries. Asker-accepted answers cost $2 to $200. Google retained 25% of the researcher's reward and a 50 cent fee per question.
In addition to the researcher's fees, a client who was satisfied with the answer could also leave a tip of up to $100. It was fully closed to new activity by late December 2006,