Some grants (small) once a year Bigger - quarterly Large - monthly
It's very similar to a sign-on bonus you can claw back in the first year or two.
Facebook definitely doesn't have a cliff in 2020.
I was under the assumption that companies offered severance pay as a means to save face.. and this is not part of the offer negotiation.
Quite the opposite- this is how exec compensation works. It seems less common in startup land but I've dealt with it before
But if you're less high-level but rare and desirable, well, some situations, like moving cross-country, might make it a bit appropriate.
Lots of people are afraid when negotiating, and the original comment shows that even making big demands up front is not catastrophic. You can still cave in later.
Unless you are receiving executive level compensation and/or you have a serious public reputation on the line, no reasonable company would consider giving you that. It would give you the perverse incentive to try to get fired and someone negotiating for that would be a strong negative signal - an economic moral hazard. https://en.wikipedia.org/wiki/Moral_hazard
Zero, apparently.