I went with the obvious, but then I hadn't looked at their website.
So if no sexual services are available:
a: Why are the handful of people being promoted on your homepage posing in their underwear? Because unwary punters might, no, scratch that, will put two and two together, make five and then be fairly unhappy when there is no sex available. Punters call 'escort' agencies to have them procure a sexual partner, and images like that won't help - what are you going to tell them on the phone in order to protect the people paying you from unwanted advances?
b: As Ian says, why are you trying to recruit on a sex workers forum? If you don't want to be in the business of procuring prostitutes for third parties that's all well and good, but then what are you doing here?
c: If you're going to try the Solid Gold Get Out which goes something along the lines of 'we're just introducing two people and anything else which happens is nothing to do with us and we don't know anything about it', you must think the police are even more stupid than we are. All they have to do is wait for a few reviews to roll in, after all.
Following that logic, I'm going down to the shed to set up a meth lab. Before I start, I'll put a sign on the outside door saying 'This Is Not A Meth Lab', because obviously my doing that will magically make it not one.