The cooperative-iterate model only works when both parties agree to cooperate.
It's not clear that you know waht the C-I model is. Could you explain your understanding of it?
Also you seem to be baseing the above statement on some sort of personal experience ("you still get...") and the end of your statement "and don't get back" also suggests that you don't know what the model is saying. Can you explain why you think the model only works as you describe or why you say "actually still no"?
In fact it appears you don't understand the overall concept of the model either. Another name given (used for a winning computer game strategy) is "tit-for-tat". The "iterative" part of the name is another clue. The model is not at all one cooperating and the other not.