We all like to be liked. So when you see your loyalty program is drawing more players to your games, you may break out in a big smile. But if you’d look a little more closely at the numbers, that smile might turn to a frown. And the frown might turn into a yell: “Stop the loyalty program! Stop it now!” Sometimes operators get a little too sure of themselves, convinced that they’ve got the edge over the players. See, for example, Tropicana vs. Don Johnson.