> The difference is that in most situations you can sell vested options on a secondary market, Uber made it a contractual requirement on vesting that they coul

> The difference is that in most situations you can sell vested options on a secondary market, Uber made it a contractual requirement on vesting that they could not be sold on any secondary market (they could only be sold back to Uber for the strike price). After Facebook learned this lesson the "hard" way[0], that's actually pretty standard. Every startup started within the last 5+ years has this same provision in their options, if you read the fine print, and older companies all amended their option terms for new grants. [0] hard way for Facebook, not for the employees.