"Pay-what-you-can requires a change in how we calculate value. It establishes payment as a mutual and ethical obligation, rather than a way of voting with your wallet…. Pay what you can is a radically different form of generosity that can only flourish in a community. It’s not an economic relationship between the consumer and the author. It’s a relationship between one book lover and another. Some people might want to pay a lot but can’t, and vice versa, and they’re all getting the same ‘free’ book. What’s happening is they’re subsidizing each other’s participation in a community of readers."

Kio Stark, It’s pay what you can, not pay what you want

Just as applicable to music, of course.