How Diffusion reversed a 30% revenue decline and built profitable, predictable growth.
The Brand
Diffusion is an established Irish boutique founded in 1991, originally operating from Clontarf, Dublin before transitioning fully online in 2015. Curated by founder Kate, the brand focuses on timeless, handpicked fashion pieces designed to mix, match and be worn season after season.
Operating as a multi-brand boutique model, Diffusion works with limited stock depth across a rotating mix of brands, making inventory management and product selection critical to performance.
The Problem
Diffusion had built its reputation through strong organic demand and loyal returning customers. However, by early 2025, revenue had begun to decline, with sales down close to 30% year-on-year in the first quarter.
The business had no structured paid acquisition system in place and was heavily reliant on organic performance. There was no scalable engine to consistently attract new customers, and growth had plateaued.
To move forward, Diffusion needed more than ads. They needed a structured, profitable growth system that reduced reliance on organic alone and created predictable monthly performance.
“Heavy Head Social didn’t just run ads, they brought clarity, structure and a real growth strategy to our business at a critical time.”
Their Goal
Diffusion’s goal was clear: grow revenue, increase new customer acquisition, and reduce reliance on organic channels, all while maintaining profitability.
Because of the boutique retail model and limited stock units per SKU, scaling had to be disciplined. The objective wasn’t aggressive spend; it was controlled, profitable growth supported by strong inventory management and product mix strategy.
The Strategy
Because Diffusion had never run paid advertising, we approached this as a full system installation rather than a campaign launch.
Using our Fashion Growth Framework, we built a structured acquisition engine tailored specifically to a boutique model with limited stock depth.
Product mix became central to performance. We ensured campaigns were not reliant on a single section or bestseller, while carefully monitoring stock levels to remove products and sizes that were selling out. This protected both ad efficiency and customer experience.
Creative diversity was prioritised to attract different buyer types into the funnel. Rather than relying solely on try-on videos, we introduced a balanced mix of formats to strengthen top-of-funnel acquisition and continuously refresh performance.
The focus remained on acquisition-led growth, building a scalable system that worked alongside organic rather than depending on it.
The Result
Our efforts delivered a clear performance turnaround for Diffusion:
Revenue Reversal: Shifted from a near 30% year-on-year decline to consistent double- and triple-digit monthly growth.
+264% Revenue Growth: Achieved in June compared to the previous year.
+140% Revenue Growth: Delivered in October during the scaling period.
+276% Increase in Orders: Significantly increased order volume during peak growth months.
+163% Increase in New Customer Rate: Built a sustainable acquisition engine rather than relying on repeat buyers.
8x Average MER: Maintained strong profitability while scaling.
4x Average aMER: Ensured acquisition-driven growth remained sustainable.
These results reflect more than revenue growth. Diffusion moved from uncertainty and decline to a structured, profitable acquisition model with predictable monthly performance.
By the end of the partnership, the paid growth system was fully installed and capable of being managed internally, giving the brand long-term control over its acquisition engine.
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