I had a roomie who looked into it, and a lot of the ads were "stock" photos with ads someone had written up to make it look legit.  There may be a few legit ads on there too, but funneling through them would be more time consuming than it would be worth, considering who is likely to respond.

There were a couple of working girls on there as well, but it is simpler to just stay with TER and go with something dependable.