Austrian B2C email decays at 2-3% monthly—but during peak churn periods (January after holidays, summer moves, GDPR re-consent campaigns), monthly decay spikes to 5-7%. Austrian consumers frequently abandon free email accounts (GMX.at, aon.at), switch providers (A1 to Magenta), or create aliases for promotions. Disposable email usage surges around major sales events. Without weekly hy... https://www.b2clead.org/austria-email-list/