My guess is that it's just not a problem worth investing in. They probably only made it somewhat difficult to hack, knowing 1) it's not worth the gain achieved

My guess is that it's just not a problem worth investing in. They probably only made it somewhat difficult to hack, knowing 1) it's not worth the gain achieved is not really worth the time hacking 2) if someone does hack it, well they were never going to pay anyways... blocked.