Twitter's own efforts in music haven't taken off but lots of music discussion and sharing happens on Twitter. So it makes sense that Billboard and Twitter would collaborate on charts to gauge shares and discussions of songs. But the concepts of sharing and discussing have been watered down by social media to mean links and references. And as the charts shift from tracking sales/downloads and radio plays/streaming to tracking more ephemeral actions, they become even easier to game. Bonus: Billboard shows you how! Beyond the issue of gauging this or measuring that, Billboard's new Twitter charts are a great move...

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