Andy Carvell from Souncloud presented his keynote at the international mobile marketing conference Target Summit Berlin 2015 (http://targetsummit.com).
He told about mechanisms of Soundcloud promotion and showed its real statistics.
Presentation: http://www.slideshare.net/targetsummit/targetsummit-berlin-soundcloud-andy-carvell
Andy Carvell (SoundCloud): Growth&Retention at Soundcloud