Soundcloud has 250 million active listeners

"Today at Disrupt Europe, SoundCloud co-founder and CEO Alexander Ljung took the stage to share two new updates and share his thoughts on the music industry, music startups and more. Back in July, SoundCloud announced that it has reached 200 million active listeners (monthly active users). But since then, the startup has grown substantially as it now reports 250 million listeners."
Source:  Techcrunch, 29th October 2013
Note - You don't need to be a registered user to listen, and my interpretation is that this isn't registered users