Kongregate, a sort of YouTube for Flash games backed by Amazon.com founder Jeff Bezos as well as Greylock Partners, will adapt some of its 4,500 games to Facebook's platform this week, Kongregate CEO Jim Greer told Inside Social Games. Kongregate makes money, or tries to, through advertising it shares with third-party game developers. Facebook doesn't need more gimmicky games, but with other widgetmakers like RockYou and Slide asking for (and getting) nine-figure valuations, don't expect the deluge to let up any time soon.