I just thought that people did a Screenshot with a High resolution system config an later edit it to make the image resolution like the raw or even "Fix" every square like a puzzle.
Well, a lot of the raw pages from the magazines have something like a windowed program (like a special image viewer made with some kind of flash player) when you tried to view a chapter @justforthelulz
When you just try to just download a image, you will get a "encrypted" image like that, the special image viewer always desencrypt every image.