I'm not claiming there's trickery involved. It's just a positive-sum trade between two agents. Normally I would write down an example to clarify what I'm saying

I'm not claiming there's trickery involved. It's just a positive-sum trade between two agents. Normally I would write down an example to clarify what I'm saying but not right now, sorry. I agree that the phrase "asymmetric payoffs" is unclear/confusing.