To the reader who's concerned about Comixology (and by extension, Marvel Unlimited) - it's a tradeoff. It does rankle that you don't own and control a file forever. But isn't it terrific that you can download another copy of any comic you've ever bought, delivered at no extra charge to you wherever you are in the world, on any device you have at hand, merely because you had an idle whim that you'd like to read it again? I've become a much more avid re-reader since I switched to digital.