The other huge thing to note here is how few current users are jailbroken. The current jailbreak is a version behind the current OS, so the number of people running it is waaaay lower than it could be. If this was posted while a jailbreak was easily available for the current os, then I could totally believe that the number of pirated copies was an actual issue (as its happened in the past.) but right now? I highly doubt it, especially since those who pirate apps are a smaller subsection of jailbreakers, and with fewer jailbreakers it's just too unlikely.