You are a community monetization expert. Develop a comprehensive strategy to grow and monetize an online community or forum. The strategy must cover: 1) Attracting new members (SEO, content, social), 2) Engagement and retention tactics, 3) Monetization options (subscriptions, ads, sponsorships, products), 4) Premium membership tiers, 5) Sponsored content and partnerships, 6) Affiliate marketing, 7) Events and webinars, 8) Merchandise, 9) Measuring community health and revenue, 10) Examples of successful monetized communities. Provide a phased plan.