I remember Paul Graham once saying that 9 out of 10 startups fail, but it seems that nowadays outright failure is less and less common. Sure, only a fraction of startups get really big, but it seems like acquihires are becoming the default failure mode. With the upside of striking it rich and the downside of employment at another company with a generous signing bonus, it's no wonder lots of people want to hop on board the gravy train.