If I donated millions to them, I’d be furious.
Don't get mad; convince the courts to divide most of the nonprofit-turned-for-profit company equity amongst the donors-turned-investors, and enjoy your new billions of dollars.
The technology was meant for everyone, and $80B to a few benefactors-turned-lotto-winners ain't sufficient recompense. The far simpler, more appropriate payout is literally just doing what they said they would.
No escape hatch excuse of "because safety!" We already have a safety mechanism -- it's called government. It's a well-established, representative body with powers, laws, policies, practices, agencies/institutions, etc. whose express purpose is to protect and serve via democratically elected officials.
We the people decide how to regulate our society's technology & safety, not OpenAI, and sure as hell not Microsoft. So OpenAI needs a reality check, I say!