This is my local Apple store. They DO have a daily limit on purchases of popular items, and the staff does their best to enforce it. They don’t pay any attention to who the customer is or where he is from. Two phones per person per day, if stock is available.
They have to deal with “regulars” who come in nearly every day, buy the limit (usually for cash), and turn them over to an “organizer” outside the store. The staff doesn’t try to control what happens outside the store, but they are aware of it. At very busy times, they limit how many people come into the store at once. Sometimes the “regulars” get pretty obnoxious, trying to sneak in ahead of their turn.
It's also UN BUDDHIST and Steve Jobs, in life, was a Buddhist ~ think he attended a dojo where I know some folks.
I suspect the problem isn't one of having stock on hand for 'murican customers ~ more like trying to enforce the sale to foreigners restriction ~ which is just a guideline ~ nothing you would be tazering a customer over.
We've had the top selling Apple store near here for years and they've never tazered anyone.