I suggest everybody who is a Prime member email them with this same request.
This is a good idea. We're paying for their service and part of that service includes access to content.
Look at it this way, though: if someone is already paying for Amazon Prime without having access to the content via their chosen device, then what incentive does Amazon have to make the content available on that individual's chosen device? Amazon already has that person's money, and they're likely going to continuing receiving that person's money regardless.