http://akamai.eprizecdn.net/dominos/225535/rules.pdf
To enter via Twitter or Facebook, you will need a Twitter or Facebook account (herein referred to as an “Account”). If you don’t already have an Account, you may create one by visiting www.twitter.com or www.facebook.com. Accounts are free, but are subject their respective Terms of Service (http://twitter.com/tos or http://facebook.com/legal/terms). There are two (2) ways to enter the Sweepstakes:
a. Enter via Twitter: During each Entry Period, log in to your Account and tweet in response to @Dominos daily question presented by Jim Kelly and include the hashtag “#DominosCalledIt” (herein referred to as your “Entry”). By completing these actions you automatically will receive one (1) entry into the Sweepstakes for each Entry Period during which you tweet in a response to the daily question.
b. Enter via Facebook: During each Entry Period, log in to your Account and visit Domino’s® Facebook page at https://www.facebook.com/Dominos. Then, comment on the daily “#DominosCalledIt” post which features the daily question presented by Jim Kelly (herein referred to as your “Entry”). You automatically will receive one (1) entry into the Sweepstakes for each Entry Period during which you comment on the post of the daily question.
Prize: FOUR HUNDRED (400) GRAND PRIZES (awarded one hundred (100) per Entry
Period): An $8 Domino’s® electronic gift code.