Twisted created the high scores list to help recognize many kinds of contribution and to encourage contributors to work on stalled tickets.
You might be surprised by just how motivating it is to see your name climb up the ladder. It has helped attract new contributors and fuel friendly, hugely productive coding rivalries.
Attempting to beat exarkun is also just fun, if mostly futile.
Stop by, check out the list, and swap stories about how your projects attract and retain contributors.