Can you explain how they could release them digitally if they don't have the rights to all of the samples on it? Given that constraint, how is giving their mus

Can you explain how they could release them digitally if they don't have the rights to all of the samples on it? Given that constraint, how is giving their music away for free (and getting marketing information about their fans) a poor choice vs just letting the more savvy ones download it from the pirate bay?