Do they even have a foot in the door? I know they have Amazon Prime Videos or whatever they are calling it but this is basically subsidized by the whole "prime offer". I thought prime already included music streaming, so now people have to pay 5 bucks a month on top of the prime fee in order to listen to "Echo music"?
If you have Prime, you can already listen to Amazon Music free on your Echo, and that has around one million songs available. This sounds like a new service that would have more songs and be competitive with Spotify or Apple Music.