How a Legacy Children’s Brand Drove Subscription Efficiency at 30% Higher AOV with Bamboo

The brand is an American children's magazine and learning subscription renowned for its engaging blend of stories, puzzles, games, and activities designed to foster creativity, critical thinking, and moral development.

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24%

lower CPA using cost cap

30%

higher AOV

The Challenge

The brand was interested in testing whether cost cap could reduce CPAs

The teams were looking to improve acquisition efficiency across two key product categories on Meta. The objective was to test whether Cost Cap bidding could reduce CPAs and drive higher value while maintaining scale.

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Bamboo's Approach

Bamboo tested Cost Cap against Lowest Cost campaigns for subscription products over 4 weeks, then extended testing for 4 months after seeing positive results in CPA, AOV, and spend efficiency.

To validate Cost Cap’s effectiveness, Bamboo:

Ran side-by-side tests of Cost Cap vs. Lowest Cost campaigns.
Focused initial testing on Subscription products where conversion rates were strong.
Measured performance across key metrics: CPA, AOV, and spend efficiency.
Ensured creative consistency across both bidding strategies to isolate performance differences.

Launched a 4-week test with a dedicated Cost Cap and Lowest Cost campaigns.

Monitored both platform-level and GA4-level CPA and AOV.
Applied learnings from early success to continue Cost Cap testing on Subscription for the following 4 months.