Photoshop sure gets a lot of shit. Most of these wannabes aren't making enough for a bootleg version. Professionals are outsourced by many photographers to do subtle photoshopping. Obviously some whores can only afford rank amateurs. A good photoshoot doesn't need photoshop. A bad one is usually made worse.
The best use of photoshop is maybe to make a selection of reasonably good looking girls homogenous - like on the LMP site. The punter can't tell who he's fucked from the photos but doesn't really care.