Joined: Aug '14
Age: 36 (M)
Yes teddybears is right about that, but in the leaderboard only the top 200 are shown as I remember. If you have only earned 21 cents so far and it is running for half a month now you might not be in there. I do not know where you can see the rest.
Joined: Mar '09
Age: 40 (F)
You will have to have enough points as said above to see yourself in the top 200. And if that is the case then take a look at the bottom of the leader board, to see when it was last updated. It is not happening daily.