Yeah, but startups, for most founders, are a HUGE schlep. And, the return on the schlep is nonlinear in the size of the schlep; it's more like exponential, assuming you keep winning your rolls of the dice. And, the n+1th roll of the dice has a much higher expectation than the nth. In other words, they've come all this way, and they're ALMOST at fuck-you money-- they wouldn't want to come back 20 years later and go through the whole process again.