The answer to your first question is : absolutely YES !! Our Contest module is build for this (along with text and video contests).
Here's some inspiration for you :
- Leroy Merlin France : http://communaute.leroymerlin.fr/t5/contests/v2/contestpage/blog-id/defi-stickers/tab/entries
- Sony Electronics Europe : http://community.sony.co.uk/t5/Blog-News-from-Sony/October-s-photography-competition-People/ba-p/1377680
- C'Vous (Casino) for product (pictures) contest : http://www.cvous.com/t5/C-vos-produits-Recommandez-vos/ct-p/CONTEST
Somebody else will probably answer to your second one you in a more detailled but the answer is yes too since our Analytics are extremely deep and detailled (See Lithium Social Intelligence Module) 🙂
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