Which pricing innovation helped revive the music industry's revenue after years of decline due to piracy?

The music industry has undergone dramatic transformations in how products are priced and consumed. From vinyl records and CDs sold at fixed prices to today's subscription-based streaming models, pricing strategies have evolved significantly. This poll tests your knowledge of a pivotal pricing innovation that changed how millions access music. Do you know which pricing strategy revolutionized the industry's revenue model in the 2010s?

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Tiered streaming subscriptions (free ad-supported and premium paid tiers)
Album bundling (including digital downloads with merchandise or concert tickets)
Pay-what-you-want model pioneered by Radiohead's 'In Rainbows'
NFT-based music ownership with royalty sharing