Oh man it has been a long time since this contest had some tension :heh:
In Thor's case I think the logical thing to do, since the photo did include the NB sign in it, which was and still is enough to prove the validity of the pic, would have been to allow the entry.
I prefer the three pics rule of course but it was the first time and the NB sign inclusion was only replaced by the three pics rule for ease and in order not to limit the members' options when taking their photo. The rules can coexist, since they are not mutually exclusive, though I see no reason to not click the camera two more times.
In Waindo's case, I can assure you that almost always the picture that won was the best taken or at least top two (I was inactive during some period though so some scum might have won undeservedly

).
Salt is good in contests as long as it's not toxic, it means there is competition.