Dang I need to fix that! If you send me an email (support@toaster.llc) I'll let you know when that works.
By the way, some users might be unwilling to provide credit card details without knowing whether the product can be shipped to their country. Knowing that in advance IMHO is a much better UX.
Also...consider, dare I say it, Windows? Or am I mis-reading "delightful, Mac-tastic software Photon Transfer is designed with love exclusively for your Mac", though I'm sure the usb c is er...bipartisan?
I'd say 30% of the people I know use a mac, the rest windows, all with linux for work etc.
*getting stuff from the states via post is no problem, just gotta check on import fees (relatively easy to circumnavigate, but I'd rather not).