Spotify's Discover Weekly playlists have 40 million listeners
 

Everybody hates Mondays, but Spotify listeners probably hate them a bit less than most. That's when the service's "Discover Weekly" playlists get refreshed, which offer a selection of personalized tracks based on your listening habits. Since launchin...

http://www.engadget.com/2016/05/25/s...ion-listeners/