The answer is simple and does not require a "mensa" meeting. "Just follow the money". You have multi millionares who rely on the outcome of a game to make or loose money. To believe they would not cheat for more money is pretty naive.
It is not a case as to whether someone cheated, it is who and how. Look back on New England cheating by "stealing" the other teams signals. This sets the standards they are willing to follow. Of course they cheated. And of course they should have very stiff consequences. They should not be able to play in the Superbowl. Letting them play is rewarding cheating. Enough said.