A limit of 6 is perfectly reasonable, and
What reason would someone have to buy six other than to resell them?
there is no way to keep scalpers from working around smaller limits if they want to.
Limiting to 1-2 per customer would be a step in the right direction.
People are given dates for drops, and people fail to be there or are too slow with the clicks, it's entirely on them, (inb4 dude I was working or whatever).
"Inb4 I was working" doesn't remove it as a completely valid excuse.
It's like they're new to toy collecting or hot item drops.
What about the people that were available but couldn't get the website to work?