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In 2003, social networking was not yet faddish. Michael Birch sold his self-admitted Friendster clone, Ringo, to online dating site Tickle for a pittance. He came to see that as a mistake, and went on to found Bebo, which he sold to AOL for a giggle-inducing $850 million. A cautionary tale for AOL: Tickle, now a unit of online jobs site Monster, laid off most of its employees in April, and informed its users by email over the weekend that Ringo was shutting down for good. (Photo by Michael Birch)