I wanted to label this as a “nothingburger”, but all the pieces of advice are either tautologies, vague general dating tips (i.e. "make sure the vibes are not off"), or straight up untrue: "They want to work on this part-time", "They want to quit their job but haven't set a date to do it", "They're going to quit their job but only after the YC interview". The latter are all very context dependent and are impossible to label as a "red flag" without further information. Possibly SEO bait?