It might seem a little ironic to write about earning money and free stuff by giving away music directly after a post about the dangers of free. But, in our defense, the services on this list are all built around the purchase of music, not the free distribution of it (well, not really, though some do give away music for free). The difference between the web sites listed in the post and online music mega-stores like iTunes or AmazonMP3 is that sharing and purchasing music on these sites might result in your being rewarded. And sometimes that reward comes in the form of cold, hard cash.
Read on:
SitePoint Blogs 6 Ways to Get Paid by Sharing Music