The real problem would likely be local laws not federal.
Specifically there are ordinances and fire codes that prohibit potentially explosive or highly flammable items and materials.
These typically address the amount of an item, gallons, pounds etc.
It's unlikely that many police forces would know or care about SA matches, but some person from the Fire Marshall would.
AFAIK there are NO ATF rules or regs about SA matches or ammo either. The 10,000 could be reached without trying when you consider 22 cals which are 500 to a carton.