CASE STUDY 01

Ad Cannibalization is Hurting Your Brand. How We Cut Ad Spend and Grew Profit.

Home ImprovementUK Marketplace£25k–£30k/month
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The situation

This brand was in a paradox that is more common than most sellers realise. Despite holding a top 1–2 ranking in their main category — with both a Best Seller and Amazon Choice badge — they were operating at a loss every single month.

Their product retailed at £25 (ex. VAT), with COGS at approximately 25% of retail price. Amazon and FBA fees, inflated by the product's large product dimensions, consumed a further 45–50% of revenue. After accounting for all costs including the agency retainer, the maths pointed to a maximum viable TACoS of around 5% to reach profitability.

The problem? At the time we took over, 80% of their sales were being driven by paid ads — and their TACoS was sitting at around 15%, putting the account firmly in the red.

Before vs. after
Before
TACoS~15%
Sales from ads80%
Organic sales20%
COGS~25%
Amazon + FBA fees~45–50%
Net marginLoss-making
After (8 weeks)
TACoS~5%
Sales from ads20%
Organic sales80%
COGS~25%
Amazon + FBA fees~45–50%
Net margin+10–15%
The diagnosis

Before touching a single campaign, we used SmartScout to analyse the brand's category market share. They were a top-3 brand even while losing money — outperforming Chinese competitors priced 50% lower. We then used Data Dive to audit organic keyword rankings. Out of their top 5 high-volume keywords, all five were ranking in the top 1–2 organic positions on terms with over 3,000 daily searches.

The root cause was clear: the brand was paying to advertise on keywords where they were already winning organically. Shoppers were clicking sponsored ads instead of the organic result directly beneath — and the brand was paying for every one of those clicks. This is ad cannibalization, and it was silently draining their margins.

What is ad cannibalization?
Cannibalization occurs when paid ads compete with your own organic listings for the same search terms — driving up costs without adding incremental sales. The brand was paying Amazon to show an ad above an organic result they already owned for free.
What we did
01
Listing overhaul
Professional 7-image carousel, SEO-optimised title and bullet points. Full A+ content and Brand Story rebuilt from scratch.
02
Keyword audit
Mapped all high-volume keyword rankings using Data Dive. Confirmed top 1–2 organic positions across primary search terms before touching ad spend.
03
Ad restructure
Removed keyword targeting budget entirely. Redirected all spend to ASIN targeting, competitor targeting, and category targeting instead.

Within one week, organic sales rose to 80% of total revenue, with ads at just 20%. Daily sales held steady at £800–£1,000 — exactly the same volume as before — but the cost of generating those sales dropped dramatically.

+15%
NET PROFIT MARGIN
~5%
TACoS ACHIEVED
8 WKS
TIME TO TURNAROUND
The lesson

Most inexperienced advertisers would never turn off keyword advertising for a brand doing strong numbers. The assumption is that ads are driving performance. But when organic rankings are already dominant, running ads on the same terms actively hurts profitability.

The brands most at risk are those that are heavily ad-dependent — because if ads stop for any reason, sales collapse overnight. Building a business where 80% of revenue comes organically is not just more profitable — it is significantly more resilient.

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