Which customer feedback innovation had the most significant impact on how music companies tracked listener preferences in the 2010s?

The music industry has undergone massive transformations in how it collects and utilizes customer feedback. From vinyl sales charts to sophisticated streaming analytics, understanding listener preferences has evolved dramatically. This poll tests your knowledge about a pivotal customer feedback innovation that changed how music companies understand their audiences. Can you identify which groundbreaking system truly revolutionized music industry feedback collection?

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Spotify's Discover Weekly algorithm, which analyzes listening patterns to create personalized playlists and feed data back to labels and artists
Apple Music's 'For You' tab, which uses manual listener ratings to generate recommendations and industry insights
SoundCloud's repost system, which tracks social sharing metrics as the primary indicator of song popularity
Pandora's Music Genome Project, which categorizes songs by over 450 attributes but doesn't incorporate user listening patterns