The fact that it's a settling doesn't solve the problem. If they decided to build whatever infrastructure was required to flag copyleft content and then essentially lock this setting, they might be in a better position. It still doesn't protect them completely. If the author fails to include the license in the book, for instance, they're in deep water. So the important thing to remember is that they can't get into this game lightly. It takes a bunch of work.
The GNU licenses are not designed to facilitate maximum spread of the content. They're designed to enforce sharing. Unless Amazon wants to get involved in that enforcement, they really can't touch this stuff.
The GNU licenses are not designed to facilitate maximum spread of the content. They're designed to enforce sharing. Unless Amazon wants to get involved in that enforcement, they really can't touch this stuff.