Ian,
No theres no oath of silence, just a natural reluctance to share the real information with other that have not paid for the privaledge. Of course some content has leaked out, and theres no secret to a lot of it, its how its used that makes the difference. If you are like me and have built up your business with reasonable pricing, even if you have the tools to achieve high prices it is very difficult to make that change. Some have done it and done incredibly well, but it means a complete change of attitude and mindset. Maybe if I had discovered it ten or fifteen years earlier I would have gone the whole hog, as I truly believe there are lots of customers in every area that are willing to pay the higher price, in fact they are right now only dealing with those CC's that, do charge, the higher price.
Dave.