This may be my rookie sense coming into play but I never understood when people say that a certain book would know what there playing ahead of time and shade the lines like saying he knows winners already.
I could be missing the whole saying accordingly but when i booked small i know some of the weaker bettors but i still wouldn't call up someone else and hammer oppo like he was poison if thats the gist of the whole saying
We used to have this guy, who had a thing for Ron Darling, especially when he started at Shea.
He would always bang in Darling at home versus anybody.
Whenever Darling had a start at Shea, and 'Johnny' called up, we knew he was going to say 'give me the Mets 100 times'
If the Vegas line was Darling (Mets) -165, the boss would give him -180, he'd still bet it.
I hear what you are saying though, it surprises me why none of the clients that got profiled never caught on.