Then whatever method you're using must not be tied to an official dev account. Honestly it's not worth the risk IMHO. iOS 7 is a huge release, so there's a decent chance Apple could crack down similar to how they did on iOS 5. In which case, if you're not using your own officially registered dev account (i.e. piggy-backing off of someone else's), as has already been stated, Apple can shut it down as they see fit.