What Are The Rules For KenoClub Keno Extra RulesKeno Extra RulesMultiCardKeno.com » Mobile Keno » To begin, the Extra feature costs an additional $1 to play alongside the standard Club Keno game. The premise behind the feature is that if the player’s Extra number matches the one drawn, Extra prizes will be awarded. Players can win in both games, as well. However, should the player in both games,..