Which music industry product innovation was first to successfully implement a 'pay-per-stream' model that fundamentally changed how artists earn revenue in the digital age?

The music industry has undergone remarkable transformations through product innovation over the decades. From vinyl records to streaming platforms, technological advancements have continuously reshaped how music is produced, distributed, and consumed. This poll tests your knowledge about a pivotal product innovation that revolutionized the way artists monetize their music in the digital era.

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Spotify's Premium subscription service (2008)
Apple's iTunes Store individual song purchases (2003)
Pandora Radio's advertising-supported streaming (2005)