I guess the owners of other teams and the mayors for cities they play in got jealous of the revenues the games generated and demanded they get a slice of the pie too. So in 1982 Pontiac, Michigan became the first cold weather site. Still, through 2014 only five Super Bowls have been awarded to truly cold weather locations- Pontiac, Minneapolis, Detroit, Indianapolis, and East Rutherford, New Jersey.
The really insane part of that last choice is it's an outdoor stadium.
IT'S A FOOTBALL GAME.