Spotify this afternoon announced that it has hit a new milestone, reaching a total of 50 million paying subscribers. That’s up from 40 million in September, suggesting Spotify is growing at a rapid pace despite the surging popularity of Apple Music.

I wonder where all of these people are coming from. Are the Tidal and Pandora users or are they new users that have never used streaming services before? Clearly, there’s still a lot of growth in the streaming business.