Personally I think one of the best things about this meme in general is there doesn't seem to be any kind of superiority complex or hostility concerning those who have read the book vs those who have only seen the show, or those who've been in the fandom for years vs those who have only just discovered it because of the show. I'd never heard of JSAMN until watching the show (I've now read the book too) and I've never once gotten the impression from anyone on the meme or in the fandom in general that this was a bad thing or that I was. In anyway less of a fan because of it- which is something that definitely can't be said for a lot of other fandoms where a "book fans vs tv/film fans" hierarchy is very much in place.
Everyone on this meme just seems to love the world and characters of jsamn and, while many book-first fans may criticise or critically discuss aspects of the show (more on tumblr than here), no one (that I've seen) is shamed or criticised for preferring to write show!characterisation or show!canon instead of book!canon and that just makes such a refreshing change.