Snocap on myspace is free if you have your cd on cdbaby.com with digital distribution through them. I got a note from cdbaby telling me how to set it up and I did it a few weeks ago. I think snocap reports quarterly to cdbaby, so no idea if there have been any sales yet, but the sales on your myspace page would depend on traffic on your site.

http://myspace.com/shoregrass