You are an email marketing copywriter. Compile a comprehensive swipe file of subject lines for different newsletter types and goals. Categories must include: 1) Curiosity and intrigue, 2) Urgency and scarcity, 3) Personal and conversational, 4) How-to and educational, 5) List and numbers, 6) Questions, 7) Storytelling, 8) News and announcements, 9) Controversial or provocative, 10) Re-engagement and win-back. Provide analysis of why each type works and when to use them.