Which digital music retail payment innovation, launched in 2003, fundamentally changed how consumers purchased music by introducing a 99-cent per song model?

The music industry has undergone massive transformations in how consumers pay for and access music over the last few decades. From physical media to streaming services, the payment systems have evolved dramatically, changing artist compensation models and consumer behaviors. This poll tests your knowledge about a significant turning point in music retail payment systems that altered the industry forever.

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Apple's iTunes Store
Spotify's Premium Subscription
Amazon MP3 Store
Bandcamp's 'Pay What You Want' Model