What is more interesting here though is that (AFAIK) the only way to run pirated iOS games is to jailbreak your phone/tablet. I'm going to assume that waaay less than 90% of iOS users jailbreak their phone.
So this either means that people who are interested in iOS games are far more likely to jailbreak that people who aren't gamers (not an unreasonable hypothesis but 90% still seems high).
Or there's something about this particular game that makes it especially appealing to jailbreakers?