neteller required a SSN for americans, but no SIN for canadians

[Robin Foolz]

for the purpose of opening an account.

i just got off live chat, which may or may not be a reliable source, asking this very question to them. live chat told me that canadians SINs are not mandatory for neither the purpose of opening a neteller account nor sending a bank wire nor for otherwise using any of the available neteller transfer services after opening an account.

my question is why was there a double standard, why was it necessary (and for what specific reason) for neteller to request a SSN from americans but not a SIN from canadians?