The root problem in this controversy, in my opinion, is that iOS offers no other way to install third party applications outside the appstore for the general pu

The root problem in this controversy, in my opinion, is that iOS offers no other way to install third party applications outside the appstore for the general public. If a blackmailing attacker hits your app with fraudulent reviews on purpose you have nowhere to go with your app. If you could at least host the .ipa for installation on your own web page, such tactics wouldn't necessarily turn into a death sentence, just a loss of access to an effective sales channel (the app store)