Points system - almost impossible (different screen names at different rooms, etc..).
We tried this at our sister site:
Titan Poker Bonus Code | SUPERPLUS | Titan Poker Bonus Code Promo and it really didn't work...but worked better because all tourneys were at Titan and therefore screen names stayed the same. But, our initial deal with Titan, was better and we were having 2-3 tourneys a month at that time.
We are trying to figure out something that would work and maybe see if we can get another room to sponsor a series like this or something.