I've a feeling it's all about music-sharing, and sharing future / current proceeds from the act of sharing. For example, just like any content, they're pretty much without any value if they're not marketed all that well. Music fans have always been sharing their favourite music. It's time to incentivise that, especially those with plenty of following or in a way, received plenty of hits.. blockchain has a way to do that. Even Steemit is already a halfway implementation..