HR walked out when he asked about revenue.

Interviewing at a drone startup with two months of unpaid terms on the table, a candidate asked a straightforward question: how does the company generate revenue? The HR representative went rigid. "Are you a partner?" they asked. Then they stood up and left the meeting. The candidate posted the story on Reddit with the caption: "Dodged a red flag." Commenters agreed: he'd dodged a whole parade.