Plenty of people using various enterprise apps that come that way, various people install beta apps that way, etc., etc., etc. Probably doesn't apply to vast majority, but enough people out there using that for all kinds of reasons (many of them being "within the norm" so to say).Why would someone even think of installing an app outside of the App Store? That is what baffles me. I know there are people that do it, but if you're smart, this is a non-issue for most iOS users.