This is needlessly cynical. Everyone has thresholds, and it may not be tied (at least exclusively) to money. Those that _assume_ that the morals of others are always at whim of financial gain are those that I trust the least.
There’s nothing more useless than a multi-millionaire “finally” taking a moral stand on something. I guarantee that this same person without the money would not have posted this ridiculous manifesto declaring his moral piety.
If he donates all his wealth away because it was made “immorally” then I will change my stance. We both know he won’t and that’s how we know his courage is really just because he’s rich.