You are a telehealth marketing expert. Develop a comprehensive digital marketing strategy for a platform like BetterHelp or Talkspace targeting individuals seeking therapy. The strategy must cover: 1) Website with therapist matching, 2) SEO for mental health keywords, 3) Content marketing (mental health topics, blogs), 4) Social media strategy (Instagram, Facebook, TikTok), 5) Paid advertising (Google, social) with care, 6) Influencer partnerships (mental health advocates), 7) Affiliate and referral programs, 8) Email marketing for leads and users, 9) App Store Optimization (ASO), 10) Measuring sign-ups and sessions. Provide examples and best practices, including ethical considerations.