Which music industry product development initiative initially faced significant resistance from record labels but eventually transformed the entire digital music marketplace?

The music industry has seen revolutionary product developments that have transformed how we experience sound. From portable listening devices to digital distribution platforms, certain companies have led the way with groundbreaking innovations. This trivia question focuses on a pivotal moment in music product development that changed how consumers interact with music. Test your knowledge of the business decisions that shaped the industry!

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Apple's iTunes Store, which introduced the 99-cent per song model in 2003
Sony's MiniDisc format, which aimed to replace cassette tapes in the 1990s
Microsoft's Zune marketplace, which pioneered the subscription streaming model in 2006
Amazon's MP3 Store, which was the first DRM-free digital music store from a major retailer