[M.B.E.]

In theory, the number of kill pots should be more than 10%, for two reasons:

(a) some players are looser than others, and in general a looser player has a greater probability of winning a pot;

(b) the players in the blinds, the button, and the cutoff all have a greater probability of winning the pot, since they are more likely to see the flop. Since those positions are next to each other, it increases the probability of the same individual winning two in a row.

I'd guess that in a 2/4 kill game, about 15-20% of the pots would be killed to 4/8. So the size of the game would be comparable to $2.35/$4.70 unkilled.