Originally Posted by bodosom
Note the absence of the words PUBLIC and written. All of these companies have policies they choose not to share for various reasons. E.g. making said policy public makes them look grasping.
In any case perhaps you're a newcomer. This is not new problem, it's been with us since the app was released. People have complained, they've been given the run-around and nothing has really changed since the release in Dec-2017 (except multi-channel audio). If you search this thread for Amazon those posts will provide some context for current discussions.
I do only lurk this thread now and then, but long time on AVS and with Apple. I also like to encourage people to write about problems and let the those who can actually do something about it know, it’s kind of like voting. It’s not always easy, but I try to avoid getting cynical, and I just keep nudging.
In my work experience, something that was a ‘policy’ was put in writing, and could therefore be defined and enforced. A ‘practice’ was something that everyone did a certain way, but that may not have a formal definition or backing by the agency or company. I suspect the Amazon position on Apple is the latter, and did not expect that it would be in writing publicly; my question was rhetorical, but I do doubt it’s an Amazon policy, and maybe not even a practice.
Since I don’t have the bandwidth to stream 4K, I don’t have an Amazon premium account (or whatever the 4K option is called), so I can’t confirm any of this and shouldn’t have commented. I just want to encourage trying to make it better.
Edit: I should add that I was happy when enough complained and the Prime Video app for ATV got DD5.1 (and probably DD+ for 4K), I do enjoy that!