Right, that's what banks were doing for Uber employees, for AFAIK, as low as 7-digit packages. I believe the interest was conditional on an IPO happening tho, and in some cases the IPO not only got delayed but the IPO price was actually a little below secondary market price right before the IPO (same as Facebook).

I would think banks would do this again? But perhaps with a longer IPO window? Like the banks that would do this would also likely participate in the IPO anyways ...