I am honestly completely baffled as to why any girl would rather work for a agency
Money - having to give someone else some of your earnings? That's a good way to make a girl bitter VERY quickly I imagine, especially as agencies really don't seem to be worth it in the slightest. It must be galling to know that indies are earning up to 50% more for the same work and I would have thought that would result in the quality of the service suffering (or at the very least, the enthusiasm with which it is delivered!) If you got something in return for giving them a cut, I could definitely understand it. But I really can't see that they do anything an indy can't do, and probably do better
Advertising - if you are a fan of glossy, photoshopped, or downright fake pics then an agency is for you... agencies are also notorious for lying about the girls. Must be shitty turning up and the guy being disappointed as you look nothing like your pics, or having to wade through endless conversations about how you don't actually do anal,the agency just likes to say you do. I know that some indies do both of the above as well, but at least I have choice if I am indy and can market myself however I like! Also, if you don't quite fit the skinny, glossy stereotype, agencies will struggle to market you well. There are a lot of excellent, successful indy gals who have a USP or a niche and work it brilliantly - I don't think an agency would be so good at that, they are more likely to just lie about you rather than take the time to highlight your particular strengths..
Security - I've heard awful stories about agencies not vetting clients or performing basic security measures like checking the number or address against a list of known dangerous punters, then doing fuck all when the girl is in trouble. I'd much rather do my own checks and use my own security buddy who I KNOW will call someone if I don't call her to say I am safe. I also need to speak to the clients myself before meeting; its amazing how you can get a sense for the ones who will be abusive or unpleasant in person - I would never trust an agency booked or pimp with pound signs in their eyes to have my safety at heart!
Driver/incall flat - it's really not hard to sort these yourself if you want, or just use taxis /hotels. I prefer that, a flat would make me nervous and drivers are pricey..
Handling enquiries - this is the only area I can see where an agency could help the prossie. It takes me several hours each day to sort my emails, organise my diary, update profile, place adverts, take new photos and upload them etc.. and I'm not even that busy. I imagine super busy full-timers must find this a pain sometimes, also clients ringing while you are with other clients / asleep / on the bus can be a bit awkward! On the other hand, I like planning my own diary as I can ensure I have enough time in between clients and can see clients when I want, not when I happen to be working for the agency. Also I like chatting via email or whatever first, it helps break the ice. It can drive you mad though and while it wouldn't be for me, I can definitely see the appeal sometimes.
But overall I can't really understand why any ladies would go the agency route. Get an assistant if bookings/enquiries are swamping you but really, when we are being paid £100 an hour, we can put up with a few frustrating unpaid hours handling that side of things I think
I suppose the looks thing is a valid point, agencies tend to have a certain standard where as anyone can set up as an indy.. but on the other hand, agencies also tend to photoshop/lie about their girls. Dodgy WGs who misrepresent themselves can be found everywhere, I'm not saying they can't, but I think a well reviewed indy would be a better bet IMO
She will probably be a lot happier with her work, anyway - which translates to better service for you!!