You are a customer retention and email marketing expert. Write a detailed, 2000-word blog post with 10 survey + incentive re-engagement email templates. For each template, include: 1) Inactivity period, 2) Survey goal, 3) Incentive type, 4) Subject line options, 5) Email body with ask, 6) Call-to-action buttons, 7) Personalization, 8) Metrics to track (response rate, re-engagement), 9) A/B testing ideas, 10) Examples.