He most certainly wants to make more money, but at this point I bet he first and foremost wants his company to survive long enough to join the big five arena, which doesn't seem likely.
He knows that OpenAI's has a first-mover advantage and that it won't last forever. They will spend everything they earn on salaries and Microsoft's cloud. As their competitors catch up, OpenAI's biggest asset will be Altman's reputation as international AI guru unless someone challenges that.