Which innovative pricing model did Spotify introduce in 2008 that revolutionized the music industry's approach to digital consumption?

The music industry has undergone dramatic transformations in how products are priced and sold to consumers. From vinyl records to digital downloads to subscription streaming, pricing strategies have evolved to meet changing consumer behaviors and technological capabilities. This trivia question explores a pivotal moment in digital music pricing strategy that changed the industry forever.

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Freemium model with ad-supported free tier and premium subscription options
Pay-per-song download structure with variable pricing based on song popularity
Artist-determined pricing where musicians set their own rates for their music
Time-based consumption pricing where users pay for minutes of listening rather than tracks