What problem does it solve? Growing an owned email list requires coordinating acquisition channels, signup incentives, consent compliance, and referral mechanics, and doing it wrong creates legal risk and low-quality subscribers. This Skill produces a structured list-growth plan so every new subscriber enters with clean consent evidence and a defined lifecycle path. ## Core Features & Use Cases - Acquisition & Lead-Magnet Planning: Selects owned, earned, and paid channels and designs an honest lead magnet or signup incentive matched to the audience. - Compliant Opt-In Capture Spec: Specifies single vs double opt-in and the consent evidence to capture at signup (timestamp, source, lawful basis, checkbox wording) for US, EU, or Canadian jurisdictions. - Referral Loop & Growth Metrics: Designs referral mechanics with quality guards and defines subscriber-growth, cost-per-opt-in, and opt-in-to-confirmed targets labeled Estimated or User-provided. - Use Case: A newsletter operator asks to grow their list by 2,000 subscribers in a quarter; the Skill inventories current signup sources, proposes a lead magnet, specs a double-opt-in flow for GDPR compliance, and hands the consent spec to the consent registry. ## Quick Start Plan how to grow my email list for B2B SaaS founders with a lead magnet and a GDPR-compliant double opt-in flow, targeting 2,000 new subscribers this quarter.