D2C brands in India are hitting a wall. Ad costs on Meta and Google have risen 40% year-on-year. CACs that were ₹800 two years ago are now ₹1,200. And without systematic retention, unit economics collapse. This guide shows you the playbook top D2C brands are using to grow 3× without proportionally scaling ad spend — by shifting from pure acquisition to a blended growth model that emphasizes LTV, repeat rate, and cohort economics.