Youth is definitely a top draw. You might have seen this study: https://www.nytimes.com/2018/08/15/style/dating-apps-online-... - men of all ages send most messages to 18-19 year-olds. But there are other factors: not my experience but some men have fetishes they want to fulfill or they want to cheat. I'm actually doing well enough on Tinder to meet a new, above average girl every day in a big city. But I'm not in the social circles that would allow me to meet top current models or ballet dancers... But this makes it possible.
It's just my impression that could be wrong but I'm 90%+ sure that none of the girls I was seeing had other "clients." I'm picky and I avoid girls who seem like "party girls" and have no job or don't go to school. Also, only one of them had a previous arrangement and all of them wanted to have chemistry first. They describe most of the other men they met as weird and unattractive.
So I agree with you that you can't trust 80%+ of them if you care about not being just another client.
@person_of_color Edit because I hit the posting limits: I've done it with breaks for real relationships in mid-to-late 30s.
Is the youth the biggest draw? From my experience highest quality sex happens with more experienced ladies, it takes them time to come to terms with their body, their visual flaws (all of us has them) etc. and just enjoy themselves.
What about trust? With prostitute, you know you can't trust her being healthy, with these ladies - is the approach the same or you hope she doesn't have 10 similar 'customers' like you?