Music sales in the first half of the year were up 8.4 percent, to $3.4 billion — the industry’s best performance since the height of the CD era. That boom is fueled entirely by the growth of paid subscription services. This year’s numbers include Apple Music, which didn’t exist a year ago but has 17 million worldwide subscribers today, as well as Spotify, which has been growing faster than Apple and has 40 million global subs.
Source: It took a couple decades, but the music business looks like it’s okay again – Recode