9.4% of men in an official Swedish study from 2017 said they have paid for sexual services (0.5% of women). It's a minority but still almost 1/10. I can only imagine that OnlyFans has normalized this behavior a lot since then.
There's also the narrative that people on these platforms are choosing to do this because they make a lot of money, and that it's less problematic than the rest of the porn industry somehow. I'm very sceptical about both of these notions.