Is there really a market for this? Why would anyone outside the US want to open a US company when you can just as easily open a company and bank account in a tax-free country with little/no oversight?
And accepting debit cards (especially US cards) is still quite hard in most of the world afaik, aside from the UK, so this is a godsend to any entrepreneurs who want a real chance at success.
This was actually the dream just half a decade ago, to incorporate in the US without having to actually get a visa and go there and easily conduct business with anyone in the world...
Nowadays, it's not as pressing, but still a great service imo...
The neglected payment methods are the country specific ones. Some major countries have very low credit-card penetration, for example in the Netherlands. The common internet payment method there is iDEAL which is a kind of two factor authenticated bank transfer. Even debit cards in the Netherlands have two distinguishing features: there isn't a PAN number on the card which makes it impossible[0] to use online in the way you'd use an embossed Visa/MasterCard, and the Dutch banks all issue their debit cards under the Maestro and V-Pay schemes.
[0] Not really, but very few people know what their debit card's PAN number is. It's possible to calculate the hidden PAN number as it's usually just a regular Maestro card, or to just scan it off the card using NFC and an appropriate app.