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