Since Patreon's doing another thing, I haven't used it myself yet, but apparently there's a worker coop creator subscription service out there:
I know a couple erotica authors who use it and am looking at doing so myself. It's free sign up, works a lot like patreon, and has gone well for the people I know who do it. Discoverability is still a mess which is always the issue with these kind of platforms but it's no worse than anything else out there, and I think you can do other content there - it's just geared towards erotica writing.