I agree that selling signed photos from fans seems very silly to me as well. I walked by such a both a couple of years ago, it might have been YA-YA for all I know. Some girl in an anime costume I didn't recognize, signing autographs for money as if I should have known who she was. Her handler was standing there and I asked what the deal there was. He seemed offended, saying she was a 'famous costumer' and I started laughing at how ridiculous that sounded. I think I said quite loudly, "Famous FAN? That's the most idiotic thing I've ever heard!" and walked off snickering. I looked back and got a true look of death from whoever the girl was. I didn't do it to annoy her, I was genuine in my reaction. That was my first run-in with something like this. I was aware of the hobby, I had no idea to that point it'd gotten like that.This is a byproduct of the internet world, where almost EVERYONE considers themself famous for the most part.
A good example of this is myself. I'm considered to be an expert in a few subjects of military history and have helped out on books, TV, movies and several magazines. I've written off and on and have been spotted on CNN, PBS and the History channel over the years. I was recently at a large military vehicle event, displaying part of a large collection of stuff I have with a specific subject. I had a few people coming up for my autograph. I was totally flabbergasted and asked why they'd want that (mostly making sure they weren't summons servers, to be honest :confused), and each time was told they wanted my autograph because they'd seen me on the internet. So, that's better than being in print, TV or movies? I guess for some, it is.