So alone, no one's responded with good info. Hopefully, someone replies to you so others can benefit from their helpful Amazon Prime/Roku insight.
Unrelated, but a Zoomtak T8 box for about $125 provides abundant access to a broad range of games, movies, shows, global news, languages, etc. from all of the Americas, Europe, Asia, etc. than anyone could reasonably watch. One-time purchase, quirky until you figure out how to use it, but no monthly fees.