Have you wondered why De La Soul is more than happy to offer its newer albums online, but has had so much trouble getting its classics (Stakes Is High and earlier) online that it gave them away at one point? You now have a good, if imperfect, explanation. Their label, Warner Music Group, tells the New York Times that its staff "don't believe it is possible" to clear all the samples in early tracks for digital music services. It doesn't explain why those samples are being held back, but the group's current sample clearance agent suspects that many of those samples may have been cleared improperly, sometimes through informal agreements. It's also possible that many of the sample deals didn't account for non-physical releases, so Warner might have to start from scratch.