I made level 99 a few weeks ago and now I'm about 200k away from level 100.
Based upon 15k points a week, I will be there in about 3 months, not that it makes I don't think there is a pot of gold at the end of the rainbow when you hit 100.
It would be nice for WGT to give you a sleeve of balls or maybe a level specific avatar when you hit 50, 75, 100 levels. Just to say thanks for all the time, balls and money you are putting into the game.