FWIW, this is what I use for my league:
POINTS SYSTEM
Replying to invite - 5 pts
Placings (6 player example)
1st - 30pts, 2nd - 25pts, 3rd - 20pts, 4th - 15pts, 5th - 5pts, 6th - 0pts
Placings (10 player example)
1st - 50pts, 2nd - 45pts, 3rd - 40pts, 4th - 35pts, 5th - 25pts
6th - 20pts, 7th - 15pts, 8th - 10pts, 9th - 5pts, 10th - 0pts.
Buy in - 5pts
Early buy in 15 min before game time - 10 pts
Hits / Knockouts - 5 pts
Bounty - additional 5 pts to knock out 5pts.
Bring A Friend - 25 pts. Bring a friend starts on the second game of the season.
Once knocked out of a tournament, you may rebuy, however, your placing will not change. If you are knocked out 1st, you will receive 0 pts for placing, but can still win top prize and earn 5 pts per KO.
PAYOUT STRUCTURE
6 players - 2 Places - 1st 70%, 2nd 30%
7 - 10 players - 3 Places - 1st 50%, 2nd 30%, 3rd 20%
12-19 players - 4 Places - 1st - 40%, 2nd - 30%, 3rd - 20%, 4th 10%
20 players - 5 Places - 1st - 40%, 2nd - 25%, 3rd - 20%, 4th - 10%, 5th - 5%
FORMULA FOR CHIP STACK AT THE MAIN EVENT
Starting Stack 10,000
Attendance - 200 per game
Points x 10
Cash won x 2
Example: Pedro Pokerplayer shows up to 7 games. He has 325 points. He won a total of $405.
Pedro starts the main event with (10,000+1400+3250+810) = 15460