It is free on JetBlue.
Remember, too, that this is a customer survey, not an objective rating.
Note that other than JetBlue's top grade, Frontier was the only carrier who got anything other than a bottom mark. Nobody else's Wi-Fi, XM, or inflight video-on-certain-aircraft offerings got them a better score. Not exactly sure what that means. It's not like JetBlue is so huge that most flyers have been repeatedly exposed to their free TV, leaving everyone else's offerings a comparable waste of time and effort.