I think there’s something that nobody here is getting: It’s not that Ayn Rand had three or four ideas, and the question is whether or not a given person understands them correctly. Ayn Rand wrote extensively, systematically on hundreds of topics in philosophy, and many in related fields. She developed, over a period decades, a rich, deep, multi-tiered philosophical structure.If by "hundreds" we take to be a minimum of 300 and systematically we take to be around 10 pages, then we are talking about 3000 pages of writings. I don't think Rand wrote that much pure philosophy at all.
The one area of philosophy which Rand treated in a systematic way was her theory of concepts.