Historically wagner is Putin’s personal army, so I believe that this move is just to make skapegoats from Shoigu and the others from their national army.

So I believe that a loss for wagner’s troops would mean Putin’s arrest and the beginning of russian reconstruction, and that would be cool.

Also, the russian national forces have more legitimacy to rebuild Russia whitout Putin and also to not descend into total chaos.

I don’t have much experience with FOSS alternatives for Spotify because I rarely use the service, but maybe you could find what you’re looking for in this list from alternativeto.net ?!