Speaking from experience, my paysite (
True Amateur Models) has very real and very natural girls on it and it continues to get several sign ups every hour and thoughout every day. Just about all of the girls (about 250 to 300 at this time) were approached by myself out in public places and were asked to work for the paysite so these are very real and exclusive amateur girls....and quite a few of them have stretch marks and other body imperfections but I have never used photoshop for any of my pics....and never will either.
I market the site for what it is, a 100% real and 100% all natural amateur site. So, to answer your question, body imperfections wll NOT hinder your sales IF you are running the type of site that works with it. If you are running a glamour modeling site or something like that then yes, body imperfections could hinder your sales. Just depends on the type of site.