But if we never celebrate altruism or philanthropy, are we not, perhaps, discouraging it? Don't we want to instill these cultural values of giving?

It seems to me that keeping quiet is a kind of purity ritual that perhaps does more harm than good as well.

Personally I don't care about MrBeast one way or the other, he doesn't affect my life in any appreciable way, if he makes money giving other people money, cool, I can think of a thousand worse ways to make money.