I didn't expect Amazon app to include rents and buys too but I should have surmised ,it really is annoying ploughing through everything picking something to watch then finding out it's a buy or rent ,no Biggie tho ,I'll cope
I have an Amazon Prime account for which I get a bunch of content at no additional cost but have to pay for the rest, and I've no problem with that as the alternative is to pay a much bigger subscription for content I'll never see as I'm not binge-watching every day. If you subscribe to Netflix you pay varying amounts depending on which plan you've got.
The bottom line is that it costs the likes of Amazon and Netflix to do what they do, so their subscribers have to pay one way or another.
Prime is not comparable with Netflix tho. Primarily Amazon Prime is shopping etc, it just so happens that you also get video.. Or some of them. Netflix your just getting films etc. They're not the same