This is almost impossible to figure out.
Cannonball has been on the forum 6 times as long as I have. He has double the posts, double the thanks and 4x the number of times thanked.
So, he should have at least double the halls. Instead only has 11 while I have 8.
Is this more a logarithmic scale? That is the only thing that makes sense. Each new ball is harder to get than the previous ball.