It is more a question of the value proposition ($10 lunches?) and considering the consumption of parental vacation time. Last summer DS7 enjoyed a hands on equations camp setup for grades 1-6 for a week at $200 and the top group matched his level even if not his passion.

Regarding qualifying, he also has a similar scatter issue. One of the instructors started the local kid's math club, I might see if I can catch a minute with him about how big the applicant pool is as that might imply how flexible they are on whether a maxed math achievement with a near IQ might work.