Hi @Wheaten! I guess you could look at this from both angles: Spotify on Volumio currently depends on Librespot whereas other platforms like some mentioned in this thread may be employing a closed integration path. And I REALLY appreciate all the work done by all the teams and people involved in this plugin!!
However, while it may be Spotify’s decision whether or not to work with or accept Librespot integration, the fact is it is also Volumio’s decision if it plans to develop a closed integration with Spotify to welcome the lossless tier into the system’s sources & functionalities. And yes, including it be maintained behind the premium or paid tier, or not, particularly for OS subscribers and hardware clients.