Why are the opponent balances N/A in tournament games?
This is really a situation where these numbers are very easy for the online player to track, since everybody starts the tournament with the same standard amount (1000 or 800 in Party Poker). Every time you see someone holding 1200 chips in a $50/$5 tournament, for example, you automatically know that he/she is up by 200. On the other hand, it would be rather complicated for No Hands Holdem to keep track of tournament balances (because of frequent all-in and side pot situations), therefore we chose to conserve that computational power for more useful operations!