I'm not sure they've changed policies on who's allowed in. For years they've required requesters to have a US-based bank account and a US billing address, and if you're a personal user, a US drivers' license number. It seems the real change has been the mandatory move to Amazon Payments which requires either an SSN for a personal account or an EIN for a business.
But.. if you were a business, you must already have the US bank account and address, and getting an EIN is not too hard from overseas (you have to call the IRS, Google for guides on it, I've done it before). If you had a personal account, you should have had to provide a US drivers license and don't they require an SSN?
Perhaps you had an account through a loophole/lack of checking though, but I believe the long term policy has been to keep non-US entities out of the system overall, most likely for tax reasons.
But.. if you were a business, you must already have the US bank account and address, and getting an EIN is not too hard from overseas (you have to call the IRS, Google for guides on it, I've done it before). If you had a personal account, you should have had to provide a US drivers license and don't they require an SSN?
Perhaps you had an account through a loophole/lack of checking though, but I believe the long term policy has been to keep non-US entities out of the system overall, most likely for tax reasons.