The problem with Substack (and Revue) is their publisher policy. The moment you turn on payments, you either bend to the ambiguity and only get your income from

The problem with Substack (and Revue) is their publisher policy. The moment you turn on payments, you either bend to the ambiguity and only get your income from them, or you risk it with a Patreon or an online store for a purpose that isn't well-served by a newsletter.