"The last thing I’d want is for a bunch of The Magazine lookalikes to flood the App Store with mediocre articles that haven’t passed through an editor and should just be (or already are) someone’s mediocre blog posts, just so they can easily charge for a subscription. There’s a time and a place for less-formal, less-polished blog writing — here and now, for instance."
I briefly touched on this point recently, and I'm glad Marco agrees. While it's exciting that new tools will soon enable people to publish their own magazines, it's important to stress that they shouldn't go around ripping off Marco's work.
Unfortunately, my hunch is that those same publishing tools will probably also enable lots of copycats. I hope I'm wrong.