There are 17 separate steaming services available on my Node 2 I....but Amazon Music isn’t one of them.....
Not sure why, I remember from my days with the Vault2 that Amazon Music was there as a service.
I tried it and it worked for sure.
Just downloaded the 90 day free trial.  I've been using Spotify because of the cost and ease of use.  I like the fact that I can control Spotify with multiple devices.  I use a laptop from my listening seat to control the notebook that's connected to my stereo.  Can't do that with Amazon.  I have to get up and check the one on the stereo to see if I would like to save an artist from a playlist.  I can scan and save artists, playlists, albums, etc. from the one on my lap, but the list is independent of any other device, so I have to do this with each device with Amazon.  I called Amazon and talked with someone about this.  They seemed genuinely interested and asked a lot of questions.  I said they should make the app more user friendly like the way Spotify is set up to access different devices.  I feel I'll cancel Amazon Music if they don't make it more user friendly.  I lost count of how many times I've had to get up and cross the room to the side of my system to do something with the app.  I'm at the age where just sitting with a remote is best.
Agree with this!
If I have to do anything more than push a few icons on my phone to listen to whatever it is I am streaming I am not interested.