They were set up as a public benefit company and their returns were capped at 100x. They (well, Sam) went out of their way to put themselves in this death march to the IPO. If they had just done what Mark Zuckerberg did with Muse, they're not in this position.
Do you know how bad you have to be at the tech business to make Mark Zuckerberg look like a prudent-yet-visionary leader?