If you concede, I'm not thanking you.

This doesn't go for when you concede early in a match or later on your own turn. But if it's my turn, you wait to see my play, and concede right before I make my final attack. You wasted my time and didn'tlet me get that last point. I'm not rewarding you. Drives me nuts. Points are a tracked metric and a concede in that situation is really annoying.