Which music retail innovation was first launched in 2003, allowing consumers to legally purchase individual digital songs for $0.99 each, revolutionizing music distribution?

The music retail landscape has transformed dramatically over decades, from vinyl shops to digital platforms. This trivia tests your knowledge about a revolutionary retail innovation that changed how consumers discovered and purchased music, creating a significant shift in the industry's marketing and sales strategies. Think about how music retail evolved from physical stores to digital experiences and the key turning points along the way.

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Apple's iTunes Store
Spotify's streaming platform
Amazon MP3 Store
Napster's paid subscription service