(Telecompaper) Amazon announced that it added 3 million new subscribers worldwide to its Prime service in the third week of December alone. In addition to free delivery on all amazon purchases, Prime offers subscribers access to the Prime Video and Music services. Amazon said that its Prime members doubled their total viewing hours of Prime Video titles during the Christmas holiday compared to 2014. The Man in the High Castle was the most watched TV season on Prime Video this holiday by 4.5 times.