I disagree. I think things like "Apple can change the rules on you", "Apple has to approve your app", "Apple makes you pay the 30%", etc are much better arguments against it. This is just about patent trolling. It could just have easily been a troll on some (surely hypothetical) patent for "Payment-Accepting Web Site That Delivers Alternative Experience for Mobile Users". In fact, an iOS dev may be in a better position than if the corresponding thing happened to a mobile web dev, in that there's a decent chance Apple's going to step in and smack down this nonsense.