In my opinion, any producer who "gives" away music is doing just that, giving it away. Most producers don't know the reproductions of giving away free audio to someone they don't even know, especially without registering the works with the Electronic Copyright Office. Even registering it with BMI, SESAC, or another orgranization can protect you if your marketing plan is to "give away free leases," which I strongly advise against because it devalues your work and sets future expectations for musicians who want your work, stand behind your product, register it with the copyright office, and get that dough with licensing baby!!