LB is Leaderboard and I believe this is similar to the top 5 players chart that you see well playing and its connected to chips I think.
Now you mention it I am not to sure if its rake or chip based. Most hands played would most likely win if they are playing anything over 50NL I think. It encourages players to play more but it usually only benefits people that have all day to sit at a table and grind.
Thanks for your interest in our on going poker leaderboard. I will try to clear up some of the questions in here regarding this.
It will reward the top 7 players.
It is not based on rake or winning chips - so it is more even to all levels.
If you see a flop (or more) at 0.01/0.02 or above, you will get 1 point.
The 'Amount' represents the number of flops (or more(turn/river)) a player has seen. The more cash game flops you see, the more points you receive.
1 flop = 1 point
The leaderboard shows up to the top 50 -click on your profile/avatar - then leaderboards
You can see your own position from the lobby as well as the full leaderboard from the profile section.
The leaderboard is only found in the game client and not on the blog.
Currently you can not opt out of the leaderboard, but we can look at that as a feature request in the future, but who doesn't love free money?
I hope I have addressed the questions and concerns around the poker leaderboard.
Thanks,
Mike