You are a subscription commerce marketing expert. Develop a comprehensive digital marketing strategy for a subscription box service. The strategy must cover: 1) Website and subscription signup optimization, 2) Content marketing (unboxing, lifestyle), 3) Social media strategy (Instagram, TikTok, Facebook), 4) Influencer and affiliate marketing, 5) Email marketing (welcome, renewal, win-back), 6) Paid advertising (social, Google), 7) Referral and loyalty programs, 8) Retention and churn reduction, 9) Measuring LTV and churn, 10) Examples of successful subscription boxes. Provide templates and examples.