

"Is it... Normal, though? To meet someone from OnlyFans?"
N O
Collabs happen - but they are arranged outside of OnlyFans.
Some girls fucks their top % fans (Which you can't say because that IS against the rules, but, believe me, I know FIRST HAND that it happens)
But fucking a random person who probably lives very very far, that just arrived on your OnlyFans and thinks he can throw $400 your way and have sex?
That does NOT happen.