Your reply seems pedantic as well. All your examples have implicit or explicit permission from the authors for the sites to post their material, as I'm sure you're well aware of.
The agreement states you must "own or otherwise control all rights to the content". Merely having permission to display the content is not sufficient.
If I were to be cynical, I'd say that the purpose of that clause is to allow Amazon to take down any site they want and have a credible excuse. Realistically it's probably just some over-zealous lawyer, but either way it has that very effect (as Amazon has demonstrated).
