Brex has been around for a long time, so employees will have been issued stock options with vastly different exercise prices.
Early employees' options will have value, but more recent options are likely underwater.
Early employees' options will have value, but more recent options are likely underwater.
I've never bothered to understand the details since none of the private companies I've worked for have had the non-cash portion of their comp be worth anything but $0 before.
Ding ding ding ding ding!
Most ICs figure this out sooner or later. Unfortunately many only discover it after being screwed hard financially.