Once you get to know how bookmakers make sure they always make profit, your gambling experience can be phenomenal. Some matches are over priced or over priced ( more odds offered for a winning team).
What things have you noticed with Bookmakers that they do not want punters to know?
I never noticed anything like that. I do know that the odds distributed for an event (their book), does not represent 100%.
They are supposed to have profit from that difference. Of course that is much more complex, and the odds also vary according to the bets they get etc, but I never noticed anything like you are saying. Maybe I did not understood what you meant.