You are a niche digital service marketing expert. Develop a comprehensive digital marketing strategy for a platform offering genealogy research tools or records. The strategy must cover: 1) Website with search and features, 2) SEO for genealogy keywords, 3) Content marketing (family history tips, stories), 4) Social media strategy (Facebook, Pinterest), 5) Influencer partnerships (genealogy bloggers), 6) Paid advertising (Google, social), 7) Free trials and samples, 8) Email marketing for leads, 9) Referral programs, 10) Measuring sign-ups and subscriptions. Provide examples and best practices.