Well you're not giving everyone a shot at tickets if you're limiting tickets to two tickets per individual address. Most residences have more than two people living at them.
And what's to prevent someone from submitting multiple orders using different (fake) addresses, if the tickets are emailed to you?
I was never asked for my credit card number. Did I do something wrong, other than not donating to charity (which I do on other occasions)?
The limit is per person, credit card #, or address. We needed to have limits to prevent scalping as much as we can and also to give everybody a shot at the tickets.
-Amy