this only asks for zip code:
https://www.wepay.com/developer/process_payments/tokenization-custom-checkout
the iframe checkout asks for a lot more things as soon as you select something that is not USA, say you select the next top entry, afghanistan.
https://www.wepay.com/developer/process_payments/iframe-checkout
does that mean the example wepay provides on their page, the top one, only works in the USA?