Acquiring new customers consumes cash. Retaining them generates it. For brands scaling past $10M, the "Leaky Bucket" isn't just a marketing annoyance; it is the single biggest threat to your EBITDA.
Fixing this leak doesn't require "more software" or discount codes. It requires a fundamental shift in how you architect the customer journey. In this playbook, we break down the Cohort Architecture required to engineer second-order profitability and protect your contribution margin.