As for the payouts, since there's only 12 of us with 2 teams each, 3 get paid?
The winner and runner up
then either worst team in group stage (points, GD, GS, GA then yellow cards if it comes to that, remember Japan in the WC? Played the last 10 mins vs Poland just kicking the ball around cos they knew they were going through on yellows lol) or the first team to lose on penalties? If there are no penalty shoot-outs then it'll go to the worst team
So in that example whichever team is the worst after the group stage will be hoping for no penalty shoot outs, nice sweat