I say the prize pot be divided evenly among all participants. Then it ceases to be a contest.
Unless we rigging riggers are riggy that we want to rig the non-contest just for the satisfaction of having rigged it. Which we do, and will.
Everybody can keep the money. Or bet on themselves against their opponent. Winner takes the money. Loser, loses, and whatever.
Their choice. If they don't bet, they don't lose, they don't make money, they're just fighting.
But it'll still be rigged.
With monopoly money.