It's only purpose for existence is to create the illusion that Meyer is a great author that wants to interact with her fans (despite the fact that there's no way to contact her and if you can, Seth won't pass it along because Meyer is so "busy" with her fame) and also as ego fodder for Seth the Asshole Website Master.
Look to the site for what flimsy defense SMeyers has for her series. Also, measure her ego as she bashed Shakespeare, Austen, and forgets that the Princess Bride is satire. Apparently she sucks at literary analysis too, despite her having actually studied English literature (WTF?).