Verification photos which are not hidden are of limited use, they only show if the verification photo matches any profile photos, it give no guarantee of what will open the door.
Verification photos which are hidden are of bugger all use and give no indication of the prossie being genuine.
Sergei has a modicum of intellect, he will verify one prossie to go for the genuine profile look and then dump pictures of new a prossie on that profile as they change over.
Dmitri is a scamming bastard who verifies a profile with his best looking girl and leaves her pictures up as he gets a succession of munters.
Then there is the trade in used profiles which must be quite a desirable commodity.
AW are less inclined to remove verified profiles even when they are obvious fakes and reported as such.