That's pretty much what I'm thinking.

I mean I've called agencies (or Adonia) and asked for a specific girl only to be told she's not available because she's not available that day, that time, that location or whatever.  Also, what guys often forget is that there are 3-5 days (average) in a month that a female just isn't available for sexual activity unless she's pregnant, or you are into blood...

A good agent may also tell you that a girl isn't available if she wants more than you're willing to spend, or has an attitude (such as no blacks and the agent knows you are black) or just wouldn't be a good fit for other reasons.  

Also, if you don't have a good relationship with the agency, for example, if you've been mean/rude to girls you've seen, shorted them money or created other problems, it is likely that an agent will say to you that a particular woman isn't available because the agent doesn't want the two of you to meet because the agent wants to protect the escort.

So calling and being told that someone isn't available, doesn't mean that they are not available AT ALL, it could just mean that they aren't available RIGHT NOW (or for whatever day/time you ask about) or RIGHT THERE WHERE YOU ARE or TO YOU.

I'm still interested though in hearing more details from the guy who made the claim that Adonia lists girls who aren't available...