I looked up the guy in purpleport an there he is. He has 62 references from girls and is recommended in ALL of them so in this site I will be difficult to do anything about it. And to leave a review in pp I think there has be a shoot book otherwise I don't think it let you. I'm saying because I've used pp myself not for escort photos but general tfp shoots. I suggest you contact the 62 girls who left him a good reference and tell them about the profit he makes selling his work. If they are unaware of it then youl have enough support to claim whatever you have to claim. A least if only a few of them unite with you then you can all do something about it. But contacting the 62 of them may be time consuming. You can try contacting some of them first an tell them that you found what he doe with the art works.
Does he know that you wanted the photos for escorting?
I'm not going to contact the girls because a) I don't have the time nor the energy and b) I don't want him to retaliate (he has nude pictures of me). Did the 62 girls signed him releases? Most probably not (he told me he doesn't sign model releases). Do they know this guy is selling fine arts prints of them? I don't know. Do they care? I don't know either. But pp is a modelling website, and these are very young girls trying to break into the modelling world, so they want promotion and the more "exposure" the better for them. Plus they are exchaging their time for professional pictures, meaning: there's no money involved. It's a win-win situation for the starting model (who needs professional pictures) and the photographer who's trying to build his portfolio.
It's when you shoot sex workers and charge them for the session that things get "tricky". Unlike the newbie fashion model I don't want the added exposure (it can ruin my life, specially if you have another job like nurse, teacher etc...). I'm also paying for his services, so i expect a degree of professionalism. Meaning: If I get promised X and receive Y I'm going to be angry.
Anyway..lesson learned. I'm moving on.