Domino's is offering a deal on top of one of their deals for a limited time. Specifically, they are offering $5 in Domino's Dollars when you digitally (online or via phone apps) order two medium two-topping pizzas for $5.99 each between now and January 13, 2013.
You can use Domino's Dollar like cash on your next online Domino's order but they're only good for 10 days after you receive them. They're delivered to your email in the form of a promo code. They can only be earned until January 13.
The promotion is the latest in a string of offers Dominos has pushed to encourage online ordering, which makes up a third of the chain's orders and frees employees to make and deliver pizzas rather than answer phones and input orders.