This article is by Curtis Arnold, CardRatings.com editor-in-chief. It’s not often that a credit card company offers to double its usual rewards on a range of its plastic for an entire year — but that’s precisely what Discover is doing for new customers with its current limited-time offer. How the offer works Discover’s eye-catching offer applies to cash-back cards including: Discover it card®-Double Cash Back your first year, Discover it®-Double Cash Back your first year, Discover it® chrome-Double Cash Back your first year, Discover it® for Students-Double Cash Back your first year, Discover it® chrome for Students-Double Cash Back your first year, and even the new NHL® Discover it® Card.