Act as an experienced SEO strategist with 5+ years of expertise in content scalability. Your task is to outline a comprehensive plan for scaling content while maintaining high SEO performance. Address the following: [1] How to identify scalable content topics within [INDUSTRY], [2] Best practices for repurposing existing content into [FORMAT], and [3] Tools and frameworks to measure the impact of scalable content on [METRIC]. Provide actionable insights, examples, and a step-by-step guide tailored for [AUDIENCE] to ensure long-term organic growth.