Wrong question I'd say. The appeal of 5060 is obvious - young girls, rather low rates, face pictures. I wasn't impressed with the service in my experience, but that's not relevant.
The place will get lots of traffic at least from non-PERB customers who don't know what's behind the scenes.
The real question is, who's continuing to be a patron when the realize most of their money goes to pimps, who are the most abusive pimps of all the groups around? Well the girls are (probably) not underage and not physically forced, but they would never choose to work at that place if they knew any alternatives.
It is a poster case why the current legislation and the stigma around the industry are harming women. Some of the girls could become fine providers if they started elsewhere, there are many good agencies and, yes, good pimps who can help the girls with their career. Instead, the girls' morals and enthusiasm are wrecked at a place like this. I wish there was a way girls could make an informed choice where to work.