I was part of this discussion years ago, acting as a sounding board by giving feedback to Ed Doonan. The basis for the criteria was any modification a person could do in a garage shop.
To me this was factory action as sold (no truing), factory stock (glass-bedding and shortening or longer recoil pad for fit allowed), factory trigger (can be set lighter to any safe pull),
The next criteria was being able to recrown since this can be done with a brass screw and lapping compound. Ed spotted a crooked crown on a Model 70 Varminter .22-.250 I'd just bought new. A few minutes work and it went from improved cylinder to sub-minute.
The other criteria was allowing a factory barrel to be set back and rechambered when worn. We both knew a competitor with a Remington 700VLS factory chamber visibly off-center that shot well. When he set it back and rechambered after many thousand rounds, it was still visibly off-center and still shot well.
As to the number of rifles sold, this became a farce. None of the manufacturers would tell us as they kept this as proprietary information. And I respect their thought.
I agree with Tom, the CBA needs increased match participation. The thought these modifications can be done at home in the garage by the shooter with a minimum of tooling should be the guideline.
Farm boy from Illinois, living in the magical Pacific Northwest