If it's overpaying in your eyes then these aren't the girls for you find someone that fits you acceptable price range for what you're looking for there's plenty out there. Your argument is no different than someone saying "I won't buy Starbucks because it's expensive" it's like cool golf clap here's your medal not going to stop others that enjoyed Starbucks from buying Starbucks though. Also, saying "I paid less before" is a dumb argument to have when I'm sure we've all gotten laid for free at some point. But we're paying for the fantasy, discreetness and/or convenience of not having to go out and pick up a girl.
As you said you can have your opinion there are rates I won't pay but I just shrug realize they're not for me and move on. For what I got I thought it was worth the price compared to some other encounters I had. If you don't then you don't. That's my last words on it