Does not matter. Amazon has it for some platforms and needs to support Windows.Is there currently a movie/TV subscription service that provides offline downloadable viewing for PC's or Macs? They all pretty much do it for individual rentals, not that I know of for the subscription model.
Anyone who is a good enough customer with Amazon can probably get some small perk if they express displeasure via phone. I have seen Amazon do it for so much. But nobody has to take my word for it. I just know I get mine for issues about Amazon that I care much about.