As funny as the thought of Stallman becoming a billionaire is, ultimately, like all celebrities, these people are strangers to the overwhelming majority of you. Parasocial relationships are never healthy, and the result of being put on a pedastal is that they became idols and symbols and ceases being people.
And I don’t think that’s what they would have wanted.
After all, the only good billionaire is a Barbi-onaire.