[cpcallen]

Substack also gets lots of revenue from subscriptions. If that's not enough to keep the platform up then perhaps they need to try to take a bigger cut (or not offer service to authors who have too few subscribers).

There's no reason for authors (who are Substack's customers) to want to make the platform more annoying for readers (some of whom are the author's customers). If the author is not making enough money (perhaps because Substack has started taking a bigger cut to cover costs) they need only to improve their writing and/or put more of it behind the paywall in order to get more subscribers.