The points scale is preset for top 50 finishing positions with a maximum total of 8290 points per tournament.
Buy-in games like the Bonanza will rarely go over 50 players, thus every player will get points for their participation. In rare instances where it does go over 50, points will still be easily had.
The top 50 positions in the Freebuy are a little harder to attain. We are currently averaging between 220-235 players per game -- about 1-in-5-ish or 20 percent.
This model works fairly well by giving more when paying more. There are other models based on formulas that sites like PokerStars, 888, et al are using -- these are being looked into.