News that Taylor Swift's team pulled her entire catalog off Spotify and other streaming music services has been the source of more tweets and traffic than any story since Apple boughts Beats for $3 billion. This led Stuart Dredge of Music Ally to do some unofficial back-of-a-napkin calculations to determined just how much Swift & Company were earning on Spotfy from her hits track "Shake It Off" before the takedown. While unofficial, Dredge was able to base is conclusions on publicly available play counts and Spotify's official estimates of overall royalty payouts: "Shake It Off’ rose from the 35th most-streamed...

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