It must be pretty frustrating to have a piece of fairly expensive equipment that projects entertainment into your home 24/7, but still doesn't show you what you want. Kinda sounds like cable, actually, but no one has cable anymore. They have a WiFi connection and Apple TV.
For a very long time, Apple TV owners have been frustrated by the fact that they can stream Netflix and Hulu, but not Amazon Prime. The Verge reports that CEO Tim Cook has finally made good on his promise to produce an app to connect the two before the end of 2017. You can now watch everything you want that's available on Amazon, which is a whole, whole lot.