Ff.net's almost monopolistic position hasn't been true in a while, AO3 has been growing quite a bit as the next best thing. Especially for the "newer" fandoms. AO3 is a lot more openly lenient in the content it allows as well, filtering on content is also easier. It is safe to say asoiaf's fandom prefers the latter with a combined 22.5k. Ff.net's heavy hitters aren't as much represented in return, like HP (119k) or Naruto (22k, which is downright tiny).