According to the OpenAI charter, their mission is to "ensure that artificial general intelligence benefits all of humanity." That's their legally binding mission - not selling cloud services by the token or licensing their models to companies like Microsoft and Apple. Any lawyer with half a brain would have advised them that those activities would almost certainly be found by the IRS and the courts to be unrelated business activities, so they spun them off as a for-profit corporation instead of taking an entirely unnecessary risk.
Just because their product is vaguely AGI related doesn't mean it has anything to do with their actual mission.