Personally I have never seen any sales generate from any of the following countries:
Kiribati, Nauru, Tuvalu, Comoros, Vanuatu, Transnistria, Moldova, Timor-Leste, Djibouti, Eritrea, Palau, Suriname, Burikina Faso, Benin, Togo, Lesotho, Solomon Islands, Malawi, Guyana, Azerbaijan, Seychelles, Turkmenistan, Bhutan, Sierra Leone, and Gabon.
Which is weird, when you think of all the effort made by the industry to generate traffic in those places....
.