I dont think so. Why would it duplicate money? You and your neighbor have $1. You both recieve $1, for a total of four dollars. Say you recieved yours last. Your money gets given to your neighbor, your neighbor has four dollars. One second after you got your dollar, you now have your neighbors money: $4. But they recieved money, so they get your money: $4. But you recieved money, so you get their money: $4.

Yeah, they have two boxes. The box gives you your neighbors money. But once a box activates the other party doesnt have money, so the second box doesnt really do anything.

Surely im misunderstanding?