The Diamond Store

Affiliates

Objectives

How do you grow a premium brand within the affiliate channel without relying on discounts? That was the challenge for The Diamond Store, a luxury retailer specialising in lab-grown diamonds and responsible British craftsmanship.

While The Diamond Store’s affiliate channel showed early potential, the programme was misaligned with its high-end positioning. By early 2025, the mix was dominated by voucher sites, driving 70% of volume - a conflict for a brand that rarely discounts.

With November’s peak trading period approaching, the brand needed to transition from discount-heavy volume to a sustainable, strategically aligned foundation that could deliver high growth at an efficient but flexible 8:1 ROI.

strategy & integration

We implemented a "fearless" program reset, prioritising curated relationships and long-term brand equity over low-value clicks:

Strategic Programme Reset

We took the bold step of removing 84% of active partners (107 out of 127) that were deemed low-value or misaligned with the brand. This allowed the team to focus on intentional, value-driven growth and rebuild the channel from the ground up.

Partner Diversification & Content Integration

We rebuilt the program to include 60+ high-quality partners by October 1st.

  • Premium Roster: Recruited closed user groups (Blue Light Card), premium loyalty sites (BA Shopping Rewards), and fashion-forward platforms like Lyst and Stylight.
  • Performance PR: Partnered with Linkby to secure presence in premium listicles and a dedicated feature in The Independent, targeting gifting audiences during the consideration phase.

Cross-Channel Synergy

Moving away from siloed agency models, the affiliate strategy was integrated with Paid Social.

  • Cross-channel data insights to prove that 40% of Black Friday sales originated from early prospecting clicks.
  • This ensured our team focused on "consistent presence," ensuring the brand was visible across the funnel well before the sale launched.

CSS & Conversion Optimisation

We leveraged CSS (Comparison Shopping Services) to drive 18% of total sales during peak. By maintaining optimal, stackable offers rather than aggressive cashback spikes, we reduced friction and protected margins.

results

This disciplined, brand-aligned approach delivered record-breaking performance during the critical Q4 period, proving that luxury and affiliates are a perfect match when managed with integrity:

  • 475% year-over-year revenue growth through the affiliate channel in November alone 
  • 25% overachievement against ROI targets 
  • 60% of November sales were driven by the newly recruited, high-quality partner network.

Balanced Diversification with no single partner type exceeding 30% of total volume.

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