> There is no anonymity between the creator and Patreon, or between Patreon and patrons. The anonymity is between the creator and the patrons.
that is exactly the problem. You have two relationships here: author -> patreon and author -> patrons. The first one is irrelevant, the second on is the problematic one. You cannot be anonymous in one case and not in another. That is not how business, law or taxes work - anywhere. Just because patrons do not want to know the legal identity does not mean it is legal to hide it. You could get sued for tax avoidance like that.
that is exactly the problem. You have two relationships here: author -> patreon and author -> patrons. The first one is irrelevant, the second on is the problematic one. You cannot be anonymous in one case and not in another. That is not how business, law or taxes work - anywhere. Just because patrons do not want to know the legal identity does not mean it is legal to hide it. You could get sued for tax avoidance like that.