Marketers are quietly running full competitor audits in under 5 minutes — and they're not paying for any SaaS tool to do it. Here's the technique spreading through AI-heavy growth communities right now. You open ChatGPT-4o or Claude 3.5 Sonnet, paste in a competitor's homepage, their about page, and a few recent LinkedIn posts. Then you run a Positioning Extraction Prompt — you tell the model: ana…