Multiplier = 1.5 for 10+ entrants
Multiplier = 2.0 for 18+ entrants

Multiplier = 3.0 for 27+ entrants

Example: 3rd in a field of 19 = 14 x 2 = 28 points

 

For the rebuy event the field size will be calculated by dividing the sum of all entries, rebuys and addons by 5 to get and 'effective' field size.