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 a serious problem. For more details, read the Serious Problems section of the JAR document and IPG 4.4. If you are to disqualify a player, follow the Disqualification Process.