In May 2007, eBay bought StumbleUpon for seventy-five million, turning it into one of the early successes of what became known as Web 2.0, the movement in which companies like Flickr and Facebook mined the social connections among internet users.2 For Camp, it seemed at the time like the highest possible level of success in Silicon Valley, and it was, by any reasonable standard—until the one that he achieved next.
