Tournament participants, tournament officials, and spectators may not wager, ante, or bet on any portion (including the outcome) of a tournament, match, or game.
Wagering damages the integrity of a tournament and gives both players and spectators a terrible image of the game and the community. It is considered damaging to the integrity of the game. For more details, read the Generally Unwanted Behavior section of the JAR document and/or the IPG 4.4.