Should you scale Meta ads or double down on email? This guide breaks down CAC, revenue per subscriber, lifetime value, and payback period to reveal which channel is truly more profitable.
Most marketers track opens and clicks. Few calculate the true revenue impact of list decay, deliverability issues, or unsubscribe spikes. Here’s the math behind what 20% list loss really costs — and how to protect your email asset.
Master the 15 essential email marketing formulas that separate high-performing teams from everyone else. Revenue per subscriber, list value, campaign ROI, engagement metrics, and profitability calculations explained with real examples and industry benchmarks.