AMPS mostly post fake pictures, but where the girl may look somewhat like the pictures. Nail shops and similar spas almost always use fake pictures that don't even begin to look like the actual girls. Many (maybe most) Back Page and other pictures of one or two girls working independently are fake.
In the case where just one or two girls work at a place, although the pictures are often fake, do the providers make a real effort to find a body double that is very similar (so much so that the customer may not be sure)?
Do the customers who have seen the posted pictures of just one or two girls working at the same place think that the pictures are similar to the girls they actually see?
Sometimes I see an ad containing a smoking hot picture of someone I just have to see as fast as possible--if she bears a close resemblance to the picture in her ad. In these cases, I can usually match the picture to ones downloaded from the internet. So I am virtually certain that the pictures are fake--yet, curiosity makes me want to call--just in the hope the girl will be as hot as in the picture.
I think pictures of independents who charge prices like $$ or more and advertise in places like p411 or on this board use real pictures (which is why faces are often hidden). So when I think of fake pictures, I am thinking of AMPS, nail shops, and Back Page or Craigslist.