Whilst listening to The Weeknd's two free albums of very high quality (with the prospect of a third of a similar standard) I got wondering as to what people here think is the best album that has been released for free.

Sit Down, Man? In Rainbows? Earl?

A related question is, how come giving away albums is becoming almost the norm in Hip-Hop and Rap but most rock and indie artists don't seem to have experimented with this in quite the same way.