In order to get your indie stuff heard ahead of 6 million indie bands trying to do the same thing, you’d have have to spend a small fortune on advertising. Im on 15 indie sites, have had reviews by e-zines, radio stations and music magazines all over the world. It probably raised my sales by MAYBE a percentage point. And if its a marketing tool then it should lead to expanding income. BUT,if someone can listen to everything you write for a few pennies, why would they bother with actually buying a download or a CD from you?