Your definition of free is not the same as mine. I mean music that is freely licensed so everyone can share it as they like. Creative Commons licenses are the great standard here. Your music requires at least giving you/Bandcamp an e-mail address (a personal gripe of mine and instant tab closer) and says "all rights reserved".
Requiring email, instant tap closer, huh? I never had any feedback regarding this. Bandcamp was just an easy place to share. I just changed the setting.