Charging "tickets" to see the most popular DJs play a special show seems like the most exciting and innovative approach. The other suggestions - affiliate commissions on MP3s, ads and sponsored rooms, are nothing new and won't cover the high royalty costs, particularly since every DJ is using an on-demand service. I would just like to see if they can monetize quickly enough to keep up with the high royalty costs they're racking up with strong growth. Envious of the rapid growth, not of the fees. ;)