Iron Maiden plans to release its greatest-hits-of-the-’80s compilation, out in mid-May, as free 320kbps downloads. The catch: the files will be in WMA, not MP3, and they’ll evaporate from your HD after you’ve played them three times. (There will also be a no-DRM option for actual purchase.) What thrift! How forward-thinking! What a you-get-what-you-pay-for lesson-learning that we the consumers will flock toward, especially the many, many of us who’ve (cough) chosen WMA as our primary file format. Way to court those plentiful Zune dollars, guys. [Metal Sucks via PTW]