It's probably the main reason why I've only really seen indies, this idea of ownership. The agency doesn't own the girls or the clients but they act as gatekeeper to both. Do they provide logistics and advertising which needs to be compensated? Sure, but that's the end of it. The client isn't going to the agency bc they love the people that built the website or secured the incall spaces, they're going there for the actual providers they are supposed to be supporting and since that relationship can be so opaque and fraught with abuse I don't want to deal with them.
I'm an independent contractor so I like supporting independent contractors. I book, talk to, meet, get hard for, fuck and thank the only other person I need to in this equation. I'd be actively trying to persuade agency girls to go indy if I saw them on the regular, probably lmao.