I heard it from someone (not me) that they've been using a modded spotify app downloaded from apkmody.io for more than a year now and it's basically free spotify premium. They (again, not me) say its pretty damn good, unbelievably good actually. They (NOT me) are pretty happy with it.
When I came across the app (I think it was on reddit), users were recommending that you set up another account in case Spotify catches on and bans your account (so you don't lose your favs/playlists/etc)
And that's what those people (not me) did, they set their original account playlists to public so they can be accessed by the second account.
However for as long as they (not me) have been using that app nothing has happened to their account.
Also just checked, they (not me) have been using that app since august 2021 with zero problems.
Mind you, I still use it because it's pretty much the only option apart from YouTube front ends on mobile, but I would advise being very careful with the permissions you give it.
Yikes! didn’t know that! Really wish that there were youtube front ends with last.fm support, because i would switch from spotify in an INSTANT if there were. if invidious or piped just added the ability to scrobble i would cancel my spotify right now