But it's also important to note that only $300K of that is in cash. The other $600K is in profit participation, which could take years (maybe even a decade!) to be realized. It could also be worth $6M a year when it's realized.
But ultimately it's an investment of your time. Or to think of it another way, you're getting paid $900K a year but you're also investing $600K a year in OpenAI, which may end up being an amazing return or nothing at all, just like any startup investment.
Although with Sam at the helm, my guess is it will probably be worth more than $600K a year.
Are they just extremely rare cases or am I just not aware of the valley and their customs?
C-Level folks make many millions a year, either liquid or paper.
I am at FAANG and virtually everyone at L6 (staff Eng level, many thousands of people) is paid at least $500k, with monthly liquidity (no cliff).
With a bit of luck stock wise, it’s also not uncommon at all to get to $500k+ at L5 (senior eng level, many dozens of thousands of people).
Everyone in my SF network (hundreds of people) virtually make above $500k.
Even at large "boring" corporate developer jobs that don't pay a fraction of the FAANG salaries, it seems the decent engineers either escaped this trap (promoted to $150k+) or have settled into the $130-140k quicksand with little to no annual raise.