I've asked them to send me by game time their pick for the winner, guess at the score, and a few sentences stating why they think so (so it's still a writing exercise and all).
I am thinking anyone who picks the winner will get 100 on the next quiz, while the person who comes closest to the score will get that and extra credit on the next paper.
But I have not fully decided on this yet.
Next month: Oscar pool! Major categories only, though.