Common Discover Card promotions as of 2015 include cash back on select purchases, double cash back after the first year for new cardholders, and airline miles earned on every purchase. The various cards and promotions are viewable on Discover.com, by selecting View All Credit Cards or Compare Credit Cards.
In addition to a standard 1-percent cash back on all purchases made with Discover cards, quarterly cash-back rewards of 5 percent may be offered for purchases made in select, predetermined categories. New cardholders are awarded double their cash back accrued after the 12th consecutive billing period that the account is open, explains Discover.
Travel credit cards may include 1.5 miles earned on every purchase, with no limit on the number of miles earned and no expiration date on miles accumulated.