# How a $1B+ Omni-Retailer Cut CAC and Boosted ROAS with Predictive C-API

A leading $1B+ omni-retailer partnered with Angler AI to tackle rising acquisition costs and limited campaign visibility. Using predictive modeling and real-time audience targeting via Angler’s Conversions API, the brand optimized Meta ad spend and unlocked efficient, profitable growth across digital and physical channels.

63%

Reduction in new customer acquisition cost (CAC)

77%

Increase in incremental return on ad spend (ROAS)

93%

Higher 7-day click-to-conversion rates

## About the Brand

Being a $1B+ omni-retailer operating across digital and physical channels, the brand struggled with rising customer acquisition costs, limited visibility into incremental performance due to privacy restrictions, and campaign reporting that highlighted problems after the fact rather than guiding spend in real time. By partnering with Angler AI, they tapped into predictive modeling to target the _Movable Middle_—the segment most likely to convert—making Meta investments more efficient and unlocking profitable growth.

## Goal

The client aimed to:

- Reduce the cost per new customer (CAC)
- Increase incremental ROAS (Return on Ad Spend)
- Validate performance gains using Meta’s Conversion Lift Test framework

## Solution

Angler AI deployed its predictive Conversions API (P-CAPI), which:

- Generates real-time predictive models to target "Movable Middle" prospects—users likely to convert within 7 days of ad interaction
- Prioritizes ad spend toward high-predictive-lifetime-value audiences
- Delivered predictions via server-side CAPI into controlled datasets for accurate A/B testing and incrementality measurement

## Outcome

Over an 8-week pilot (May 6 – July 8, 2025), across ASC+ and Audience campaigns, Angler delivered substantial improvements:

- **New customer acquisition cost** decreased by up to **63%**
- **Incremental ROAS** increased by up to **77%**
- **Engaged audience ROAS** surged by **183%**, with cost per order down by **58%**
- **Click→conversion (7-day)** rates nearly doubled (up to **+93%**)