However, this fails all along the line, because it is (as well as described by my Vorrenzensisten) just not to the well-known and fully functional Spotify application, but a streaming client like Airplay (ie an app, to which I one of source device data streame).
That alone would have a knock-out criterion, were it not for the fact that non-Premium users of Spotify can not do anything with the app completely.
Here it must be clearly replenished ...