I'm suggesting a little bigger than that - Blizzard is making a ton of money from WoW subscriptions every month, and $12/month for turntable would be pretty easy for me to justify.

Disagree. You make pennies on an mp3 purchase at best. It takes a lot of pennies and purchases just to hit 10 bucks.

The entire traditional music licensing world is based on scaling up pennies and it has provided real income for many for a long time.

Pennies from radio play is different from pennies from an mp3 sale.

I don't know any start-up making significant $ from mp3 referral sales. Tops they may make couple grand but that is not much when you are getting 5m uniques(won't even pay for the streaming; and making 2k from mp3 affiliate sales is tough even with 5M uniques.)

you'd probably make more money on ads than on affiliate for $1 mp3s.