Here's the real reason why k2 isn't trying to get the hacks detected:
K2 knows that hackers are the primary reason why those legit chooblets get their k/d fucked up. Now, if k2 lets you run around with the opk for a couple of weeks, they'll think more people would want to buy premium for the k/d reset. K2 doesn't care, as long as they make a profit.