Here is some information from the site:
We’re at it again with another opportunity to grab one of over 50,000 Domino’s gift cards sometime soon. This time, we’re giving away over $150,000 in FREE pizza! Just click the ‘I Want In’ button to be notified when the fun begins. The promotion will go live sometime before September 30th, so be prepared to move quickly! Once it starts, it’s first come, first served and the biggest rewards go first.
This Domino’s Fan Perk is limited to the first 200,000 participants, so make sure to opt-in now!