[flatline3]

The storage format is proprietary and some kind of obfuscation of the image data is done.

According to the ToS, you don't own a license to the comics, so you can't export them, or even hold onto the comics if comiXology disappears.

[ZanderEarth32]

Damn, didn't realize that. But to be honest, it won't change my habits. I enjoy reading comics, not the actual comics themselves. I don't "collect" them, I just buy and read them, and will probably never reread a book.