Systems and methods to process payments based on payment deals

In one aspect, an account identifier is associated with a deal purchased by a user from a deal site. The deal has a face value applicable to a transaction with a predetermined merchant, if the transaction satisfies one or more predetermined criteria. The user pays the deal site an amount smaller than the face value. When the account identifier is used at a transaction terminal to initiate a payment transaction, a transaction handler determines whether the payment transaction satisfies the one or more predetermined criteria; and if so, the transaction handler provides the transaction terminal with an authorization response identifying the remaining balance, which is determined by deducting the face value from the payment transaction. The account identifier may be a one-time account number generated specifically for the deal purchased by the user, or an account number of the user used to purchase the deal from the deal site.