So I guess tip-offs for spotting a fake CRK are a big secret. Us poor peasants with lowly $100 folders aren't worthy of such privileged information.
The point of not making the mistakes public knowledge is because the people making the fakes can and have used that information to make their fakes look more legitimate.
So if someone spots that the XYZ is wrong, once the counterfeiter hears about this, it tips him off so he knows to change XYZ to look more like the real deal.
The secrecy has nothing to do with keeping the information from the "poor peasants". I'm sure if you added up all of the $100 folders you've bought/sold/traded, you'd have enough to buy a few Sebenza's.