How do you feel about Plexamp not being available to your users
I know that it is possible to add users to your Plex home, but its not an ideal option for many. I feel that I have supported Plex and the users that I personally paid for Plex Pass for are not able to use it.
It isn't a reasonable expectation for any of my users to spend 50% the price of Spotify for my limited music library.
There's a subscription fee to use the app they developed, Plexamp. It offers features that their other apps don't. However, access to your Plex server is free. Those users can use the free Plex app or the web interface. If they don't want to pay the subscription, they can stick with Spotify. If your library is so limited, maybe it's better they do? Or, maybe they could also access other Plex servers which have a less limited selection?