Which music streaming platform first introduced the 'pay-per-stream' model that revolutionized how artists earn revenue from digital distribution?

The music industry has undergone massive transformation with digital streaming platforms reshaping how artists generate revenue and build brand loyalty. Major streaming services have dramatically changed consumer trends and created new data analytics opportunities to understand listener behavior. How well do you understand the financial impact these services have had on the music industry?

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Spotify (2008)
Bandcamp (2007)
Apple Music (2015)
Tidal (2014)