"Sam, does that mean that if I subscribe to a non-free OnlyFans I will chat with the creator herself?"

Man, how I wish to say "yes", but... Frustratingly, no. More and more succesful (and new) creators directly go with agencies nowadays.

OnlyFans even updated their terms and conditions to explicitly allow this. Nothing guarantees you're chatting with whom you think you are. Even on paid pages.
And they're also starting to advertise other models in paid pages?!