Which e-commerce innovation is credited with helping reverse the music industry's 15-year revenue decline that began in 1999?

The digital revolution transformed how we consume music, from physical records to streaming platforms. But do you know which e-commerce innovation truly revolutionized the industry's revenue model? Test your knowledge about the pivotal moments that reshaped how artists and labels monetize music in the digital age. This question explores a key turning point that changed the economics of the music business forever.

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Apple's iTunes Store pay-per-download model
Spotify's premium subscription streaming service
Bandcamp's direct artist-to-fan sales platform
YouTube's Content ID monetization system