Screenshot
Yea, if you ping a lot you may want to choose not to bet in betting servers.
http://forum.toribash.com/showthread.php?t=447296
suggested this they won't do anything I think. They don't mind the tc sink probably.
The person may have just lost, because resently, I believe they put the Tc in a slot, and the bet remains active even if you disconnect, and if you won, you get the tc you would have gotten.
I'm about 75% sure they added this, because I think I remember that I got Tc from a bet when I disconnected once.