Why do digital channels compress margins but expand reach?

Digital distribution reduces marginal cost per customer and lowers operational overhead. CAC shifts from branch infrastructure to digital marketing, analytics, and platform maintenance. While unit margins may decline, expanded reach allows scale, cross-selling, and ecosystem integration. Banks and insurers benefit from long-tail customers and recurring revenue. Evidence indicates digital channels can reduce cost-to-serve by 20–40% while improving customer retention (BCG, 2022; Bain, 2021).