And the reason they used to give is that "Chromecast doesn't support Amazon Prime Video and that's confusing for users" - well guess whose decision that was?

Same thing with the Apple TV. And they apparently said that Apple wouldn't let their app into the store which is BS, since they already have an app for Prime Video for iOS.

That's misleading to say the best! It's clearly the other way round and should be told that way.

Amazon also has a weird bureaucracy regarding where they ship to/from their Amazon Fire devices

the "standard" one just ships to certain countries, the "basic" one only ships from certain places to certain other places

Plus when you search for a Chromecast you get a Fire stick. Amazon is in the wrong here and glad to see Google push back.