Lucas and Luna drill into a costly blind spot in TikTok Shop advertising: ROAS that looks strong but quietly ignores the revenue brands actually keep after refunds, fees, and ad-influenced organic sales. Using a realistic DTC example, they show why a campaign reporting a 4.2 return on ad spend might actually be delivering less than 2.0 in real profit, and how the platform's attribution window and 'shopable' organic traffic inflate the number. They walk through the fixes: adjusting for gross margin, adding a refund buffer, segmenting by new versus repeat customers, and testing incrementality with geo or holdout experiments. The episode also touches on how TikTok's algorithm rewards two distinct ad creatives—one for discovery, one for conversion—and why the same ROAS target shouldn't apply to both. Practical, metric-focused, and grounded in the current 2026 e-commerce landscape, this is a must-listen for any performance marketer running paid social on TikTok Shop. No hot takes, just the math behind the metric.