I’ve seen that for a well-known large tech company, and I wasn’t even employed in the US, making those seem stranger. Friends and former colleagues pushed back against that (very publicly and for obvious reasons in one case) and didn’t get to keep their vested options: they had to exercise what they had before leaving.

There was one thing that I cared about (anti-competitive behavior, things could technically be illegal, but what counts is policy so it really depends on what the local authority wants to enforce), so I asked a lawyer, and they said: No way this agreement prevents you from answering that kind of questioning.