Although the rules started out being that things should be linked to a thread where the pics appeared, it's obvious that this is becoming a "cool pics" thread too. (And unlike other sites one could name, we're all about adjusting to the way our users actually use the site!)
So while I agree with Amata's point that if there's a post to go with the photo I'd sure like to read it, and that's the preferred choice, I don't mind that this seems to be evolving into simply a really nice photo thread as well. It all serves the greater goal, which is to encourage more folks to take and post photos here.
As for how the judges judge things, etc., that's up to them. In the meantime, enjoy the great photos and keep 'em coming!