Which pricing strategy innovation fundamentally transformed the music streaming industry around 2008-2010, leading to mass market adoption?

The music industry has undergone dramatic transformations with digital streaming services revolutionizing how we consume music. Pricing strategies for these platforms have evolved considerably since their inception, balancing consumer expectations, artist compensation, and platform sustainability. This trivia tests your knowledge of a pivotal pricing innovation that changed the streaming landscape forever.

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Freemium model with ad-supported tier and premium subscription options
Pay-per-song download structure (similar to iTunes' original model)
Album-only bundle pricing with monthly release access
Time-based listening caps with surge pricing during peak hours