Because AGI is still some years away even if you are optimistic; and OpenAI must avoid going to the ground in the meantime due to lack of revenue. Selling ads and believing that AGI is reachable in the near future is not incompatible.

>Because AGI is still some years away

For years now, proponents have insisted that AI would improve at an exponential rate. I think we can now say for sure that this was incorrect.