This is my Response to this study that I saw at PrefixMag:
The logic behind streaming is that money is made over the entire distributed lifespan of the track. The theory is that this extended earning lifespan will overtake the fixed .99 model of iTunes. It remains to be seen. But I think that if you factor in what I believe is a fact, that streaming subscribers consume much much more music than downloaders, we are headed for a tipping point where streaming music proves its worth.