Nope, that's not how this works.
If i walk into cake store i expect to see and be able to purchase cakes. If that cake store sells no cakes, despite being advertised as a cake store, the owner of the store doesn't get to say "it's your fault you expected us to sell cakes not mine".
OnlyFans has a known communally accepted reputation attached to it, if you do not meet those exceptions you are abusing that platforms reputation to lure in people to make a profit.
Ethan could have easily made a Patreon, they even allow nudity, Patreon has a reputation of supporting artists and small businesses. Survey one thousand people "what's the first thing you think of when i say OnlyFans" and the overwhelmingly majority will tell you "amateur porn".