Count me as confused and oblivious (my wife would certainly agree).
I seem to get TPs when people have appreciated something I have said, and I give them when I appreciate something others have said. Since I don't really follow others' counts, and since I kind of like the occasionally recognition, I have never seen a problem with them. I hope the use of TPs continues as I think it's a nice component -- not essential, but nice. It's probably best not to think of it as a competition and just give as the spirit moves.