Maintain a ladder indefinitely
its not a tournament with a fixed final. Instead players "challenge" other players and post scores. See freeonlineleague.com for their implementation of ladders. You have a more awesome site.
This feature request looks like a duplicate of http://feedback.challonge.com/forums/44455-feature-requests/suggestions/2711796-ladder-tournament-type
The request has been around for a while - but I'll add my comment saying "yes please!"
Do you mean a running leaderboard? If so I completely agree. I would like to be able to run an event, and then when the event if completed have the points transferred to the leaderboard. Would also like Seasonal/Lifetime filters etc.
Brandon Casey commented
This would be nice! a ladder with no point goal, games played goal, or end date. Just pure open ended. But allow the organizer to "close it" or otherwise mark it as complete and announce winners at that point.
Ensure ladders maintain ELO scores