The promotion ended on 5/31 so if you didnt join it is too late.
Today I got an email for my iTunes giftcard, which required a reply with your mailing address so mail the card out to you. Make sure you locate this email and respond to get your iTunes card.
The email is addressed "The Arby's $10,000 Gourmazing Giveaway" check you spam folders etc.
Email looks like:
You should have also already received an email confirming your Amazon gift card if you ordered an amazon gift card as well. See THIS post for more info
