> It's a single-member LLC

Maybe exempt pass-throughs?

Why do it for entities of that size at all? It's not about their type of incorporation, it's about not adding more paperwork for small businesses.

You're using or. That means you don't need a low revenue number. You could use $10B because nearly all of the relevant companies would already be in on the basis of the number of employees regardless, so all you need is to catch the few outliers that manage to be major companies without hitting the employee threshold.