Which innovation in music retail analytics first allowed the Billboard Hot 100 chart to include streaming data alongside traditional sales and radio airplay?

The music industry has undergone dramatic transformations with the rise of digital streaming services. These platforms revolutionized not just how we consume music, but also how artists, producers, and labels track consumer behavior and measure success. This trivia question explores a pivotal moment in music retail analytics that changed how the industry measures popularity and success.

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Spotify's API integration with Billboard in 2012
Nielsen SoundScan's streaming measurement system introduced in 2013
Apple Music's exclusive partnership with Billboard in 2015
YouTube's view count analytics incorporation in 2010