Thats true but Im not sure how effective is it really. Could be just a waste of 30$ for 1000 plays..
Right..it isn't free...but...you get a lot of exposure from people all over the world. In reality though...I'm thinking it probably isn't worth it...people are just not prone to buy a song...unless they hear it on the 'real' radio. But if you goal is to have a lot of different people hear your music...that is one venue. You cannot pay Pandora to play your music...but you can pay these guys and you then have an audience you never had before.