Kudos to Spotify for supporting libspotify and its use-cases for so many years. I'm sure it hasn't been easy and that copyright owners haven't been very fond of it.
Spotify has become pretty hostile towards its users, which makes it hard for me to believe there was any good will involved here.
Spotify has got to be one of the least shady services I use.
I've experienced a massive downgrade of the offline experience in the Android client over the last couple years. It used to behave offline-first, so if I drove out of cell service and played a saved album, it would look locally first. Now I have to force it to offline mode explicitly, which is a pain when on a long rural road trip. If I don't, it'll spin endlessly trying to load album art and tracks I already have saved.
Edit: It doesn't seem to me like the content itself is of any particular interest to them beyond the engagement its resulting in. It's that same hateful and harmful content you see on all these platforms where money has become more important than humanity.
The most hostile thing they do to paying users, IMO, is not implementing basic features that people have been crying about for years. One example: you can't just select a bunch of songs and put them into a playlist.
Just checked, they finally added it...