This is why I've never purchased non physical media. I will rent via whatever service, but I have never assumed that purchase of digital media; mp3, mp4, video game, whatever on any platform that I can't archive to offline storage & use is a legitimate purchase of license.

In my opinion anyone who thinks they "own" digital things they did not create (or did create & then subsequently distributed, ie: shared) is delusional. Your art; movie, song, play, poem, bit of code is owned, in part, by the platform you chose to post it to. As private companies they can limit, hide, or remove any content you trust them to distribute.

In my opinion there is no 'secret' reservation. It's implicit. You purchased the rights to a thing that you can't lay hands on. What claim do you really have to it? You can say that you have them money. To which they will reply that they gave you a product. You'll claim that it wasn't what they promised. They'll point out that buried somewhere in the TOC it's covered by a sub-clause.

What I'm saying is that you should buy your poetry in person, from local poets, in person. Unless you don't know me personally. Then you should buy my poetry from the online distribution platform that fully endorses my political views.

You seem like the kinda guy that's here to play. Are you over 18?

Yet another .

This is really nothing new. Back before there was such a thing as prime video, Amazon offered just videos you could purchase. Some of these were videos that weren't available anywhere else (and some still aren't.)

I did purchase one knowing full well that it could get removed, so I used some tools to rip the video into a format I could keep. Sure enough, a few years later the video was gone. If I hadn't make a backup for myself, I wouldn't have any recourse.