Originally Posted by After Shock Media

1 set of 20 pictures - 485 sites; done every day by many people on a per person basis. Hell people often run through double or triple that amount of sites they submit to and we are not talking about link dumps, free sites and the like.

Then assuming standard skims and what not of typical circle jerk tgps, chances get higher and higher via trades that a given surfer will indeed begin to see duplicate picture sets.

Now I will not say that non exclusive can not or does not make money either. It still does and people can do things to slightly alter photos (flip image, crops, etc) to make it appear different if they choose.