*NOTE - As of 07/2013, users who were only ever active on the old site and never signed up for this one are marked in grey text.
NOTE 2 - As of 01/2014, due to the amount of users on the list, the text was beginning to get unreadably small. For this reason, the list now shows only users with five points or more (ie. those who have either won a contest or placed in the top four at least twice).
So, here's the leaderboard as it stands after the What Happened in 2015? contest:

...And below are all the old ones, for posterity.
Spoiler: show