You claim that this class of people won't work for a "big company" for "any amount of money," yet in the next breath you admit that they will work for those companies in the context of a "talent acquisition."

What is a "talent acquisition" if not an alternate mode of compensation to persuade individuals to "take a corporate job" who previously considered themselves above such positions? Yeah, it sounds more impressive to tell people "we got bought by X" instead of "I took a job with X," but either way they've "gone corporate." You're still dealing with the same endless HR meetings, PHBs, "culture," etc, as all the other "drones."

Yes, a good number of such "acquisition hires" leave after earn-out is complete, typically two to four years. This is actually a fairly lengthy of time for any high-value employee to hold any position in the valley these days, startup or not.