We have around 800+ fans for our retail site on FB. We want to start running a monthly giveaway for our FB fans, where they would post their order number to FB and once a month we would pick a winner at random. Idea is to increase our FB fans from actual customers.
This should only be possible for people who 'like' us, and we'd create a new giveaway every month.
I've no idea where to start with this. We don't want to spam the wall (so promoted in order shipped emails, and on our website).
So I'm thinking this would be on a tab or page, which we'd post to the wall once a month with the winner initials/order number.
Would this be best set up as a event? static page? or maybe discussion board?