It sounds very out of line of what you'd expect.
But, yeah, kind of confusing, especially for Altman.
He was the kind of guy on the way to become worth $100 billion and more, with enough luck, meaning to be the next Musk or Zuckerberg of AI, but if he chooses to remain inside a behemoth like MS the “most” that he can aspire to is a few hundred millions, maybe a billion or two at the most, but nothing more than that.