Which AI innovation did Spotify implement in 2020 that dramatically increased customer engagement with their premium subscription offerings?

The music retail industry has undergone significant transformation with artificial intelligence reshaping how consumers discover, purchase, and interact with music products. From smart recommendation engines to virtual shopping assistants, AI has become a cornerstone of modern music retail strategy. This poll tests your knowledge about a groundbreaking AI implementation that revolutionized a major music retailer's business model.

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AI-powered personalized 'Wrapped' campaign that analyzes listening habits and creates custom end-of-year summaries
Discovery Mode algorithm that allows artists to prioritize specific tracks in recommendation systems for a cut of royalty payments
Voice-activated shopping assistant that recommends instrument purchases based on streaming preferences
Blockchain-based loyalty program that rewards customers with exclusive content based on listening patterns