Just wanted to clarify for you. Most people have been bidding on the Coke Zero codes as a stand alone item because there is a special promotion going on right now for them. The other products don't work with this particular promo.
I believe you earn one credit towards NCAA gear and 1 entry into the bracket challenge for every coke zero code you enter online. For every entry you get one team in the tournament and each time your team advances to the next round you win a prize.