"What's in your wallet?"
OK, this conversation started to piss me off a little. I dare you all to visit the bars and other places where they have pool tables (skip the professional clubs) and tell me how many people actually used the pro rules.
Look my friend, sorry to get you so upset. But you asked for our opinion and you got it. I don't understand why it would piss you off unless...are you the author?
The stuff covered in this material is not even pertinent to any banger bar I've ever heard of. For example, it discusses 7 power levels for shots to use while playing 8 Ball. Well, the first two are both fouls and gives ball in hand to your opponent. Power level zero says "You simply touch the white ball without moving it at all. Used for some defensive tactics." While deliberate fouls can be a legitimate strategy in games such as one pocket or straight pool where the penalty is one point, it is basically useless for games like 8 Ball where ball in hand is the penalty.
We gave you our opinion. You are free to learn and practice everything you can from this source, but don't expect us to cosign this B.S. If you get serious about this game you will probably have to unlearn much of it.