Ignoring that your comment is about the wrong company, I'd also like to point out that in the music world Spotify is just a convenient scapegoat (as a consumer-facing brand) for practices that are actually the fault of record labels.

Spotify pays out most of its income (iirc around 70%) to labels, but it's up to the contracts between the labels and artists how much money ends up being paid out. Spotify is out of the loop at this point.