As enterprise advertisers deploy advanced agentic AI systems like Stagwell's SATS, smaller advertisers face a growing competitive gap in targeting, optimization, and audience intelligence. However, the advantage isn't insurmountable. By understanding what agentic systems actually do and leveraging competitive ad intelligence platforms to reverse-engineer winning campaigns, independent marketers can replicate many of the same strategic outputs without enterprise-scale budgets. This article explores how competitive intelligence can become the practical alternative to expensive AI advertising infrastructure.