[Adger Smith]

All of this is good discussion.
The driving force in Quotas if multi faceted.
All the Things that have been mentioned before, space, Pro's, Ect.
Then there is participation at Divisional events. The biggie! These events are a commodity that NHRA sells. They are forcing racers to attend the divisional races for "Grade Points" That automatically makes the Divisional race worth more as a sellable product.. NHRA guarantee of XXX cars (consisting of the NHRA member cars in Each division).
The buying track owner can be pretty sure he will get XX number of the XXX division members. That gives him confidence he will have Racers to make a profit off his investment... Like they say.. follow the money.