The less 'real' music you listen to, the fewer royalties that Spotify has to pay to the record labels. If you're listening to more 'fake' music, then this saves Spotify money, and increases their profit margins. This is the exact same incentive behind their push into podcasts, another kind of audio content they don't have to pay royalties on. In this case, either because it's shared freely, or because they've acquired the original publisher themselves, e.g. Gimlet Media, Parcast and The Ringer.