My guess: they would lose a ton of cultural cachet.
Turning OpenAI into an ads business is basically admitting that AGI isn’t coming down the pipeline anytime soon. Yes, I know people will make some cost-based argument that ads + agi is perfectly logical.
But that’s not how people will perceive things, and OpenAI knows this. And I think the masses have a point: if we are really a few years away from AGI replacing the entire labor force, then there’s surely higher margin businesses they can engage in compared to ads. Especially since they are allegedly a non-profit.
After Google and Facebook, nobody is buying the “just a few ads to fund operating costs” argument either.