Take a cup of coffee, keep adding sugar until you reach the point that you like it the most, and then when you add more sugar, you actually like it less. Well, the food industry knows that, and they spend huge amounts of effort finding the perfect spot, not just for sugar, but for fat and salt, as well.
They read their sports pages, know their statistics and either root like hell or boo our butts off. I love it. Give me vocal fans, pro or con, over the tourist types who show up in Houston or Montreal and just sit there.