I was at a table when a player bought the 4 & 10 for $25 each, plus had a variety of other bets out there. Every roll that he won something, he would press one or the other $25, adding the $1 vig.
This also happened when he went from $75 to $100.
At that time I looked at him and said, "I see what you're doing there."
He started to laugh and then the dealer said, "We know what he's doing too, but it's not worth arguing about."
So then I said to him, "Congratulations, you've beaten the casino at their own game, for a whole buck. Woo hoo!"
He laughed and said, "One more roll and it'll be TWO bucks!"
Bottom line: Your mileage may vary. The dealer wasn't cheating. Just lazy.
Superstitions are silly, childish, irrational rituals, born out of fear of the unknown. But how much does it cost to knock on wood?
Note that the same could be said for Religion. I.E. Religion is nothing more than organized superstition.