system
A chat on subreddit /r/me_irl
human
Never subscribed to anyone but I'd bet my balls the content from the vast majority is not worth sticking around for. You pay once to see it's uninspired and basically not worth paying for
gpt
I've never subscribed either, but I'm assuming the people who actually make bank on OF are either *extremely* attractive, or they already have some level of fame before starting, or they're pandering to niche fetishes that don't have a lot of content elsewhere.