She was an author of fiction, like Terry Pratchett. Lots of people draw philosophical inspiration from Pratchett, but that doesn't make him a philosopher.
Sorry to burst some bubble here, but most of the philosophical content of her writings is just rehashed Nietzsche, sometimes near-verbatim. All the while she claimed, she never read any philosopher but Aristotle. For anyone who has read Nietzsche and then opens a Rand book, this is laughable.