Whomever agreed to Apple's terms told Apple, by way of agreeing to the contract, that they had full rights and authority to grant Apple the right to distribute the app with all the associated restrictions, etc. outlined in the contract. It would seem that when you consider the terms of the GPL, that person did not have the authority to claim such a thing. That person lied or, at best, was simply mistaken. This isn't Apple's fault. That's all I'm saying. Perhaps ultimately we agree on that point.