“Mark Pincus smelled the social-game opportunity first. He was the guy who, with Reid Hoffman, had been part of the angel investment that, in his words, was like winning lotto. In late 2006, Matt Cohler tipped him off that Facebook was going to launch a platform and was looking for entrepreneurs to come up with apps. We don’t want any money from you, he told Pincus. Just build cool stuff and we’ll expose you to our traffic.”