I have not been in the game long enough to get to the 10+ but am not surprised. I still see one of the ladies I first met when i started in this 6+ years ago. I really enjoy her personality and sexually so still see her on occasion. She seem more of a FWB than an ATF. The only difference between her and an old college friend that was a frequent FWB in the day and the provider is how we met. In both cases we keep up the general rituals in the relationship. THe old college friend and I catch upon our circle of friends and our families, have a few drinks or shots and get carnal. WIth the provider, we still TCB, catch up on each others lives and play.
If I borrow from how we met in a P4P situation, maybe it is PFWB?