Because DISH network is dropping AMC, they are offering their customers a free Roku XD player if you call/chat and say you might switch providers because of AMC. Depending on your subscription and account status you may not be eligible for this offer and you may also be able to get a statement credit of $5/month for 6 months or $10/mo for 12 months in addition to the Roku.
It's an interesting move for a major provider to encourage customers to get their programming via a network player. Slippery slope.
Credit to some comments on Engadget and a thread at SatelliteGuys.