The listing, Red Baron Feasts For One Entry Codes (MLG) has ended.
10 unused codes will be emailed to the winner.
Contest runs through August 31.
These codes are good for entry into their sweepstakes. Every code wins something though most of them will win 1 month free online gaming. They limit you to 3 months online gaming so, after that it's hit or miss if you win anything, though every entry puts you in the running for the grand prize.
The grand prize is a trip to TX for some gaming convention incl. dinner w/ your choice of expert player. Other prizes include Game systems, etc. I'm not really a gamer so a lot of it doesn't mean much to me. All the details are on their website though.
They will let you enter up to 5 codes a day.
http://play.redbaron.com/Page/HomePage?0