Which e-commerce innovation fundamentally transformed the music industry's revenue model in the early 2000s?

The music retail landscape has undergone dramatic changes with the rise of digital platforms and streaming services. This transformation has reshaped consumer behavior and revolutionized how music reaches audiences. Test your knowledge about how innovative e-commerce platforms have disrupted traditional music distribution channels and changed artist-fan relationships forever.

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Apple's iTunes Store allowing individual song purchases for $0.99
Amazon's CD warehouse direct-to-consumer shipping model
eBay's marketplace for collector vinyl and rare recordings
MySpace's artist profile pages with embedded music players