Interestingly I was able to add the $25/$100 costco to my card through this and it shows up in the list twice - once from the Twitter sync and once from this - with the Twitter one redeemed and the new one not.
Recent Contest Wins
Samsung Galaxy S III and 1 month T-Mobile service (ARV $650)
Kelty Folder Cooler - Marlboro (ARV $75)
$100 Fandango Gift Card (ARV $100 - duh!)