Once public, the VCs typically fade away...as do the more reasonable chances at 10x returns...those are early/seed round numbers...do you mean private cos? They are the ones competing for VC dollars. Once public they don't need the VCs much and those board members representing VCs usually roll off the board once they make it public...their work is done and they go looking for next startup to invest in....
Unless you are talking pink sheet companies / OTC stocks. That is a shady world!
my $.02