The for-profit would not exist if the non-profit was not able to maintain control. The only reason it does exist is because they were able to structure it in such a way that the for-profit is completely beholden to the non-profit. There is no requirement in the charter for the non-profit or the operating agreement of the for-profit to maintain a balance - it explicitly is the opposite of that. The operating agreement that all investors in and employees of the for-profit must sign explicitly states that investments should be considered donations, no profits are obligated to be made or returned to anyone, all money might be dumped into AGI R&D, etc. and that the for-profit is specifically beholden to the charter and mission of the non-profit.

https://openai.com/our-structure