I've got a couple of recurve bows made by Steve.... About 15 or so years ago after he worked on Gladiator.
Regarding GoT, I guess there's the book audience, the book/TV audience, and the Tv audience. It's not hard to assume that the TV audience massively outweighs the other elements of the GoT market.... And what pays the piper etc.
By modern movie standards (it is rated 18 IIRC) it's not particularly excessive. Thing is, I guess, it gets compared to TV when it's really more comparable to a series of movies.