Which music streaming service first introduced the 'freemium' subscription model (combining free ad-supported tier with paid premium subscriptions) that became the industry standard?

The music industry has undergone a revolutionary transformation in how consumers access and pay for music over the past two decades. Subscription-based streaming services have largely replaced traditional ownership models, reshaping artist revenue streams and consumer behaviors. This trivia question examines a pivotal moment in this subscription model evolution that changed the industry landscape forever.

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Spotify (2008)
Apple Music (2015)
Pandora (2005)
Tidal (2014)