I play the CrappyBird and I notice this:
When you end a game at "SERVER RESPONSE" you get the mesage "Perfect! Your reward: x DIRA" and if the reward is quite big it gets listed to "Top players".
I managed couple of times to do a veri big record (the on was about 320) and  "SERVER RESPONSE" gave me the mesage "you are gaining a little to fast today, did you drink lots of red bull" and nothing got listed to "Top players".
I hope at list to get the pay for them(this happend last hour so I have to wait and see).