What I meant is that each time score goes in a bank, at the end of the round the score gets duplicated by the number of players there are, and then split by the number of players there are.
So if two people each had two banks sacrificing the exact same amount of sentries for the exact same amount of score, 2000 would go in each bank because BOTH people sacrificed the 2000 score, so 2000 would be in each of the banks. At the end, it gives them 4000 score to then sacrifice and profit from.