I think some Game Theory 101 might be relevant here. Yes it's good to cooperate initially but after that, tit for tat is the thing to do: https://en.wikipedia.

I think some Game Theory 101 might be relevant here. Yes it's good to cooperate initially but after that, tit for tat is the thing to do: https://en.wikipedia.org/wiki/Tit_for_tat https://en.wikipedia.org/wiki/Tit_for_tat