U can choose trader its the closet option, Actuyally i can not edit and its not possible
I need a programmer to make igiver addons which not easy or possible right now.
So the closet one to use it Tarder option
I highly suggest GODFATHER's opinion. The purpose of feedback is givev the trader, buyer and giveaway inviter positive or negative Reputation. You can choose trade then type in the comment that you get a free invite. It is not that complicated