Amazon's not going to cancel the TV show over internet nerd rants about historicity, and GRRM's financial concerns would have been much more productively supported if he'd spoken up against D&D's massacre of his IP, not trying to massacre Tolkien's
Sorry, I'm just an internet pedant picking up the point that although Tolkien is dead, there are several people / institutions with a big stake in the legacy of his writings.
The Tolkien estate, however, isn't. And Amazon are spending a lot of money on LoTR spinoff shows.