“The results of (Radiohead’s online, pay-what-you-wish) experiment will be hard to judge unless the band reveals how many albums it sells and what people paid. It should share that information because it could be vital to the health of the music industry. There’s a wide gap between the demand for music and the public’s willingness to pay for it, yet the most popular legal outlet for music online — Apple’s iTunes store — gives artists and labels little pricing flexibility.”