Apple would be in violation of the GPL for distributing the app with those restrictions tacked on. If I were them I wouldn't distribute GPL apps either.

They would basically have to special case apps licensed w/ the GPL. Sadly I doubt it's worth the legal and/or operations costs involved.

I'm not a license snob, whatever works for a project is great (GPL has been great for Linux). However this is a prime example of why MIT and BSD licenses are more free than the GPL.