Contracts can require you to agree to things that are otherwise illegal for them to do. IANAL, but to give an extreme example, Motorola can't ask you to rob a bank in exchange for the ability to purchase a device. There are things such as the First Sale Doctrine (not necessarily applicable here, but still) that dictate limitations that a seller of a copy written entity (copyrights on a physical object, sigh). Such things could maybe render parts of a EULA moot depending on local laws. Again, IANAL.