Did you look more closely at the results of this generator? The generated images are really not suitable for the same purposes as the content you can find behind those paid memberships.
Seriously though, it's very good for a tiny homebrew project that hasn't been running long or with huge resources. Just think about where this is gonna be in 3 years. Photorealistic interactive videogames are probably not far off. I read a while back that Second Life is now a hub for virtual sex experiences so I assume this sort of tech will converge, and do so rapidly.