They probably have stupid regional licensing agreements with publishers. I guess that without the books to release for the Kindle, Amazon doesn't think releasing the Kindles to be worth it in these countries. I don't know, that's just my guess.
Here in Turkey, there are folks buying from US and selling with a small premium ($50ish), worked well for my son's Paperwhite 2 (with ads). You can tell Amazon that you don't live in US and they disable ads instantly [1]. Sometimes, you need to change your country in the Amazon profile to buy a book from US store and back, but I can live with that.