From the article:

"...journalist Liz Pelly has conducted an in-depth investigation, and published her findings in Harper’s—they are part of her forthcoming book Mood Machine: The Rise of Spotify and the Costs of the Perfect Playlist.

...

"Now she writes:

'What I uncovered was an elaborate internal program. Spotify, I discovered, not only has partnerships with a web of production companies, which, as one former employee put it, provide Spotify with “music we benefited from financially,” but also a team of employees working to seed these tracks on playlists across the platform. In doing so, they are effectively working to grow the percentage of total streams of music that is cheaper for the platform.'

In other words, Spotify has gone to war against musicians and record labels."