Spotify has financial incentive to obfuscate their UI to tilt people toward mindlessly consuming playlists. This is because labels pay Spotify to put certain songs on large playlists, and Spotify knows playlists are a good habit to push onto their users. Radio was used to discover new music decades ago, but paying a radio station (directly) to play a song is illegal (payola), so DJs had to break new songs, styles, an…
Source? This is what Spotify says about it themselves:
"We want to make something crystal clear: no one can pay to be added to one of Spotify’s editorial playlists."
https://community.spotify.com/t5/FAQs/How-to-get-your-music-...
Sure, they could be lying but then all the labels and their employees would need to be in on the lie as well.