I have a little different perspective on why SCCA does not draw many new racers. As a builder I talk to 40+ newbs a year and the usual reason why not the SCCA is contact. They hear about the crashfest that both IT and SM is. Thats what they tell me, not the other way around. And want nothing to do with it. The second biggest reason is the desire to build there car to there taste and NASA fits that better. Just add weight.
Chris