If there's really is, why would someone who knows share that??. If he/she discover it by himself, of course that person don't want to spread that to keep it as a secret for the house. Nobody know if there's really is.
The secrets of the house is sometimes cheating. I don't know if all of them but all i know that some of them.
I think there is a certain pattern in every gambling sites but that is too hard to decipher even if he's someone well known in the series of gambling it can take a year or so on playing it, and I think the pattern will be at random and there will be a lot and tons of it so it is pretty hard!