http://www.economist.com/news/business/21708300-once-enemies-record-labels-spotify-and-apple-are-now-spinning-profits-them-change
Most of that rebound is due to growth in subscription-streaming revenues. In the first half of 2016 subscription streaming in America reached a retail value of $1 billion, up by over $500m in just one year, putting it on a par with digital downloads. Retail revenues from radio-like services such as Pandora, and from ad-supported on-demand streaming such as YouTube and Spotify’s free service are faring much less well—they grew in America by less than a tenth, to $600m.