"Not too long ago, I subscribed to a Linux magazine for beginners called Tux. Fantastic magazine, but the last I heard they were 'headed out,' so to speak, due largely to a lack of funding. However, unlike bigger publishers, which include Linux Magazine, Tux was special because they were giving away the magazine in the PDF format. That's right, they provided a free copy of their magazine in hopes of generating enough revenue in ad sales alone. Unfortunately, it did not work out so well for them to that degree..."
