I decided to sign up for a paid music service today.  I was deciding between Amazon Music Unlimited and YouTube Premium, which includes Music, since for $2 extra, there are other benefits.  I thought it was an option because I saw it listed as one of the services to add in the Sonos app.  BUT, apparently Alexa can't start a song with it.  Is that right?  I expected to be able to change the default app, and then just continue and be able to play most any song.  Instead, I find that I can't even get Alexa to start a song with it, even if I say Play (Song Name) with YouTube Music.  Is that right?  Did I just waste $13?  Thanks in advance.