How Mars Men turned retention math into a nine-figure growth engine

The operating system

Mars Men runs a subscription-first DTC model and manages growth like a finance function, not a campaign calendar. Co-founder and CMO Zach Stuck describes setting the month’s ad budget off forecasted recurring revenue (spending into next month’s expected subscription income now), gated by two guardrails: blended MER has to cover operating expenses, and new-customer ROAS has to hold at target.^[3]

The forecast isn’t a blended average. The team rebuilt it to apply retention curves at the individual-customer level, with different curves per subscription type (for example 30- vs 90-day plans), and uses that per-customer retention model to decide how much it is safe to spend to acquire.^[3]

Acquisition is then managed against daily new-customer targets set per channel: email, SMS, paid, and organic each carry a number, so the mix is steered to a quota rather than a single blended return.^[3]

The bet that made it

The pivotal decision was flipping the store to subscription-only. Early on that meant losing money on each acquisition, until cohort data proved the payback. Stuck says the new-customer payback period ran roughly 30 to 45 days, fast enough to reinvest aggressively rather than wait on annualized LTV.^[2]

Behind the funnel is brute-force creative velocity. Stuck says the brand fired up hundreds of landing pages in roughly its first year: 50-plus unique templates with two to three CRO tests a week, treating the landing page, not the ad, as the highest-leverage variable to test.^[2]

The outcome, per Stuck: a roughly $100M revenue run rate in under 18 months, profitable and bootstrapped, before raising a $27.5M Series A led by consumer-focused private-equity firm L Catterton that closed in March 2026. Revenue and run-rate figures are the founder’s own; the raise and its lead investor are confirmed by the deal counsel’s announcement.^{[1] [2]}