The system needs to compensate for time off of playing. The score needs to degrade over time. If you play bad in a few tournaments and drop your rating, its better for you then not playing at all for a year. Even though you would be technically worse by not playing.
I've played several years in Vegas and Reno, my Fargo Rate is 656 and I never made it to any final board in the old open division. My starter rating is N/A, robustness of 206.
This year I felt I wasn't able to compete with the Semi-pro division, and I didn't know what the cut off would be for the Platinum division before I signed up. But of course CSI made a decision to place Advanced players at 625 starting, and open players at 525. So they made the cut off at 624 for Gold...
I wonder how much my score would swing if I was given a 525 starting score instead of N/A.