If he actually changed Amazon's behavior so that it wasn't a horrible place to work for? If he donated an actual, significant portion of his wealth that required real sacrifice on his part?

Basically, if he did something that had a positive effect on the world that also had real consequences for him. Something that actually shows he _means_ it, actually _wants_ the world to be better even if it hurts himself.

If Bezos or Musk or Zuckerberg or Gates(1) did any of that, I'd be thinking differently.

(1) The Gates foundation has done a LOT. Bill Gates is still worth ~$135,000,000,000. A quick search says ending homelessness in the USA would take less than a quarter of that.

Him acting altruistically now with his vast resources is the best we can hope for I suppose.