I went there just now and got the following message:
'The Amazing Spider-Man Video Game Instant Win Game promotion ended at 11:59PM EST on July 15, 2012. Visit www.hardees.com to sign up for special offers and promotions from Hardee's® restaurants.'...
Okay, I put my codes in and for each one I enter I get the response: 'Please correct the highlighted fields above'. Is anybody else having this problem?