pretty much all of the frames are donated by racers. they're then sold (at low prices) to younger racers in japan in order to promote the sport - a sport which can be quite expensive for young people who might be interested because of the cost of njs parts. all proceeds from the sold frames are donated back into youth bicycling programs. in the beginning it probably wasn't a big deal, since the few frames they were selling to americans meant money to promote the sport. but i think after the explosion, shinji probably realized not many japanese kids would be able to get a frame if they were all being snatched up by us. not to mention shinji is a racer himself and offers this service in his spare time.