PoliStats works in much the same way as football game statistics. Whenever you're watching a football game they are able to pull up amazing statistics about each player, each team, how many times a team has lost in their home arena during a given month. The stats are amazing. Why not have statistics and facts pulled up during political debates--how a candidate actually voted previous to the bologna that he's currently spouting, what their charitable donations are, what organizations or corporations donated to their campaign, which lobbyists they associate with etc. This would give the viewing public a much clearer picture of who the candidate actually is, rather than relying soley on the lies they are spewing at the moment to gain votes. This would also give the commentators much more interesting lines of commentary.
Reward: better information before voting, trapping candidates in lies and obfuscation, better representation of facts and figures.