Thanks for doing that research, sexyboy
My experience with these types of cases is there are two classes of girls who do this kind of marketing: 1) newbie college girls 2) lesbians.
They put out lame ads and charge at the high-end to see if the market will bear it. They are content to catch the occasional naive customer and are casual about it enough to wait until a naive customer comes along.
They have a full-time vocation already and just want some extra money for shopping. They do not care about the client (the lesbians may even have a thinly-veiled contempt for men) and will flake, without giving any notice, for any trivial reason. ("My girlfriend phoned and wanted to go for coffee...I fell asleep.....I forgot...I was tired" etc).
Service is usually very poor, and they are unreliable. But they do not worry about repeat business as they will be quitting soon...and leave the business until they urgently need to shop again.