As a comparison though, the first 2 challenges took about 200~300 lines of code. This challenge looks like more then 2000~3000. It literally is asking for enough that it made me say "Screw that, I'd rather work on my own projects" rather then "Hey, that looks like it'd be interesting". I could see a photo-mosaic challenge by itself, without all the cruft of logins and such, but this seems like massive feature creep compared to previous challenges.
Edit: Oh, and on top of all that, it's supposed to be deployed on a server... Seriously, screw that, I'm not paying hosting costs for a crappy contest like this.