The trust problem here isn't with non-profits in general, it's specifically with Sam Altman. So no, you probably shouldn't trust the next non-profit he is involved with. But also, people have warned about Altman in advance.
Yes, you should still trust cooperatives and syndicates. I am surprised they’re attempting such a brazenly disrespectful move, but in general, the people who started this company were self-avowed capitalists through-and-through; the fact that they eventually reverted to seeking personal gain isn’t surprising in itself. That’s basically their world view: whatever I can do to enrich myself is moral because Ethical Egoism/Free Market/etc.