How are people playing Amazon Music Unlimited through Sonos? All I can manage to get on the S2 app is the Free, Prime version. I called Amazon support and was told that S2 doesn't support Unlimited, that I can only cast to a Sonos speaker that has Bluetooth or Alexa. If that's true, that's nuts.
It seems that others here do use Unlimited on Sonos, but I can't see how.
I do subscribe to Unlimited, 10 bucks per month, but can only listen on my pc, phone or tablet and only using the Amazon App, not S2.