Which groundbreaking product development decision by Spotify in 2013 fundamentally changed the streaming music business model?

The music industry has undergone dramatic transformations with the rise of digital streaming platforms. Behind these changes were key product development decisions that forever altered how we consume music. This trivia question focuses on a pivotal moment in streaming music history that shaped today's market landscape. Test your knowledge about the strategic product choices that led to the modern music consumption experience!

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Introducing the 'Discover Weekly' personalized playlist algorithm
Launching a free mobile listening tier with shuffle-only mode
Creating the first music streaming hardware device
Implementing the first music streaming subscription family plan