"Working at a YC startup can help you get into YC" isn't right, since what the post says is that a recommendation from a founder of a YC-funded startup that you've worked at can help get you into YC. 80 chars, anyone?
Edit: ok, thought of one. We've changed the title from "One surprising hack to get into YC". If anyone can suggest a better title, we're happy to change it again.