I was curious anyway and did some fast googling. Interesting, because seems like nobody knows and Apple has reacted sometimes and sometimes not.
Quite many sources are mixing copyrigh and licenses, those are two different thigs. But I couldn’t find what is policy of Apple (that wasn’t too big suprise, quite normal situation).
But I did find this from The Verge, but is like 4 years old and doesn’t answer either.
Well, quite soon big guys here will answer to you.