Email marketing was supposed to die. It didn't. Why the inbox is the highest-ROI owned channel in 2026 — and the five disciplines that separate brands compounding from brands broadcasting.
Email never had a chance in Brazil. ~148M WhatsApp users, ~91% of Brazilian internet users, WhatsApp open rates ~98% vs email 12-20%. Why brand operators should plan their CRM stack around WhatsApp first.
Instagram organic reach is under 5%. Email delivers 90%. The audience ownership shift is the brand-side response — stop renting attention, start owning it. The math, the playbook, and the AI-citation layer that ties it together.
