Gonna take a wild guess here.
If my sniffer is calibrated right, "Feedback" in this case refers to completed transactions, like on eBay. I'm gonna guess further that this "Feedback Score" refers to completed transactions in our Tradin' Post. I'll guess one step further that this is a feature of the forum software, to be implemented or modified at a later date. I see some other changes in this 'n' that menu which don't affect me much which are also likely software features. I don't know the backend of this forum software at all, but I do know a bit about a couple of others, and my guesses are based on that knowledge.