I don't think a verified pic is always needed for us to believe a member is for real. For instance, I can't remember Oxy posting verified pics (he might have done though!) and obviously in the past those guys have posted their shots elsewhere, but we know they are real as they don't just post the same 5 shots again and again, they come back with great new stuff.
I don't care if i have seen another person in shots on another site, but for the competition, they should be new shots surely. I mean, think of it in terms of any other competition - Titanic isn't still being entered for the Oscars every year is it, just because it won some a few years back?