By 2026, B2C consumer email data will decay at an unprecedented 4-5% monthly—up from 2-3% today. Why? Increased provider switching (Gmail to Proton, Outlook to iCloud), AI-generated temporary addresses, and automated privacy tools that revoke consent. In peak months (January, September), decay spikes to 7-8%. A 90-day-old list will lose 12-18% accuracy. Worse, decayed addresses become... https://www.b2clead.org/b2c-leads-database/