Just to play Devil's Advocate here - tell me exactly where is the Country of Amazon? It's a river, not a Region. In both Brazil and Peru there are states called Amazonas, but that's not the same as Amazon and I bet that would be one hell of a fight if one of either Brazil or Peru wanted .Amazonas.
TLD's are not (yet) given on that state or county Level. Countries, yes, but not yet states. Otherwise I would be expecting to see .yorkshire popping up sometime soon.
On the otherhand I dont really see the point of more TLD's (beyond lining ICANN's pockets). So I'm all for rejecting the TLD, but NOT on the grounds of a make believe country which surrounds a river which is split between different real countries, and only theoretically might ever get used.