is there any reason why non-US residents can't just put in a fake US address and proceed to get the results they need? I believe you need a US billing address

is there any reason why non-US residents can't just put in a fake US address and proceed to get the results they need? I believe you need a US billing address to pay for Mechanical Turk, so a fake address won't work. I'm not sure why this is the case, since you can pay for other Amazon products from outside the US.