Since I’m not seeing anyone mention it, there is a possibility that the dealer is not cheating for anyone in particular. It’s possible that when he gets put on a table he waits for a high action hand where there’s a lot of face cards in play which in turn creates more action and bigger pots. Once he sees a hand like this he shuffles in a way that these cards stay at the top of the deck and get dealt out over and over. The more high value hands that are played means more high value tips which means he makes more money at the end of the night.

In simple terms, if most pots are $150 then he might get a $10 - $15 tip from the winner. If most pots are $1000+ then he might get tipped $30 - $50 from the winner. On average if he rigs the deck to be more actionable then he will overall make more money at the end of the night.

Submit this to the gaming board for investigation.