» A mixed record for startups: Some tech companies that have passed on the major buyout offers, like Facebook (which passed on a $1 billion buyout offer from Yahoo! way back in 2006), have only gotten much larger on their own. Other tech giants that missed the buyout opportunity – Yahoo! turned down an epic deal from Microsoft in 2008 and nosedived ever since. Other companies who have taken the buyout have had success stories (YouTube, which is a cornerstone of Google’s offerings) and precipitous declines (MySpace, which is trying to make a comeback; and Bebo, which sold to AOL and then lost nearly all of its value when it was sold again a couple years later). Which is to say, it’s too soon to know whether Groupon screwed up here.