[rchaud]

> but isn't part of the appeal of Substack discoverability?

Discoverability should be happening on non-paid platforms like social media, message boards or channels independent of Substack itself. If customer acquisition is based on your presence on Substack, you will have to stay on it forever, paying whatever they charge, because migrating to a different platform will damage acquisition. Which of course is exactly what Substack's strategy is.