When reviewing the history of ID Software I came upon an interesting fact: Back in Softdisk, i.e. before ID was a thing, the team managed a product called "Gamer's Edge", which is a bi-monthly subscription service (people nowadays would love the idea) that gave players two full games and a bunch of other smaller tools.
I'm wondering if indie teams should more or less do the same if they are not eyeing big hits, which few managed to pull off. Two months might be too stingy, but with the engine and tools built it might not be impossible to pull off a by quarter subscription?