People weren't given the chance to cancel their orders at TFSource... the toy showed up at people's houses without warning of the changes.

And if there is anyone outside of America ordering from a US-based source, it's either because they missed out from a cheaper source, or are ordering a number of other items which offsets the extra few US$ on certain toys like this one. Or they prefer to just stick to one or two online stores with their credit card info, and haven't yet been forced to sign up to another source just to get a particular figure.
But I think most of TFSource's customers for JP toys would be Americans who have to pay extra to import anyway.