I see that lasting almost three weeks before Apple shut it down (assuming anyone uses it...)
"The only exception to the foregoing is scripts and code downloaded and run by Apple's built-in WebKit framework or JavascriptCore, provided that such scripts and code do not change the primary purpose of the Application by providing features or functionality that are inconsistent with the intended and advertised purpose of the Application as submitted to the App Store."
Apple don't have a track record of interpreting their terms particularly generously.
That seems to be a reasonable clause, and should actually benefit everyone, provided the developers stick to the rule and don't abuse that option.