Drug addiction is not really something that's compatible with adult performing. I'm sure it would correlate with some type of sex work (the cheapest 'street corner trick-turning' comes to mind) but those are not the type of people you'll find on OnlyFans.
I wouldn't be surprised if you find more drug addicts in a high-speed trading floor than the average OnlyFans performer population.
Ps I'm not advocating it as a career option but I know some people are drawn to it and genuinely like it. Reddit is/was full of people doing it for free and I don't think it's a bad idea to try to make a job out of it for those people.