Sounds about right for what I hear from guys who are "serious" SB site members. 30% fake bait to attract guys, 30% flakes among the female posts, 30% not apealing.
Of the 10% they say they have had some good success, but the amount of work seems excessive. For the time they spend, and the $, I guess I'd prefer the escort route. When I actually push them to be honest with what it costs them per score, it isn't that different. But some like the thrill of the hunt I guess.