I’m not sure extreme wealth is possible with a non-profit. You can pay yourself half a million a year, get incredible kickbacks by the firms you hire to manage the nonprofits investments, have the non-profit hire outside companies that you have financial interests in, and probably some other stuff. But none of these things are going to get you a hundred million dollars out of a non profit. The exception seems to be OpenAI which is definitely going to be netting at least a couple people over a billion dollars, but as Elon says, I don’t understand how or why this is possible
Yes definitely that is the far majority. I actually had Mozilla and their CEO in mind when I was thinking of "extreme" wealth. Also I've heard some of the huge charities in the US have some execs pulling down many millions per year, but I don't want to name any names because I'm not certain.
