They could charge some shekels to be promoted from belt to belt, where the guy has to perform different exercises and WODs with specified benchmarks and form to be promoted, and have the certified instructors do it every 4 or six months in each box, only to be uploaded to the Crossfit database. The Crossfit games could be divided in belt categories too.

It'd be really interesting just to see how future competitors evolved since they started practicing it, and when did they peak in their athletic abilities.