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Attribution Playbook
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cost in 90 days — or free until you do.
nCAC is the verified cost to acquire a net-new customer, calculated across all marketing channels simultaneously. Unlike platform-reported ROAS, nCAC distinguishes between repeat buyers and first-time purchasers, giving you an accurate view of growth spend efficiency.
Meta's algorithm optimizes for the fastest-converting audiences — which are often existing customers. Even in prospecting campaigns, Meta's AI drifts toward repeat buyers because they convert quickly. Brands need a third-party system to verify the true new-vs-repeat split.
Advanced Signal sends Meta a verified "new customer purchase" event instead of a generic "purchase" event. This trains Meta's algorithm to find genuinely new customers, not just easy converters. Brands like Joanna Vargas skincare reduced nCAC from $116 to $69 in 30 days without changing budget.
Wicked Reports uses first-party, cookieless tracking with a focus on verified new customer attribution. Triple Whale uses a 7-day cookie window and survey-weighted data; Northbeam is cookie-dependent and approximate. Only Wicked Reports offers a 3× ROI guarantee.
Wicked Reports guarantees that within 90 days, you'll log at least 3× your subscription cost in verified budget decisions — or the platform is free until you do. At $50K/month in ad spend, most brands hit the threshold in approximately 2 weeks.

