108% increase in Amazon PPC sales, with ACoS reduced to 14.21%
Seller AURA scaled advertising sales for Spare Parts Holland while improving efficiency, more than doubling PPC revenue in a single month and cutting ACoS, on an account with a lifetime ROAS of 9.78.
The account
Spare Parts Holland is a Dutch supplier of hydraulic components for agricultural, industrial and construction machinery, with a catalogue of more than 750 products including pumps, valves, cylinders and seals. The company ships daily to customers in Europe, the United States, Canada and other markets.
As it expanded on Amazon, the goal was to improve advertising efficiency while continuing to scale sales in the US market.
What was holding growth back
Budget not following performance
Spend was not consistently directed to the best-performing campaigns.
Limited return on ad spend
Budget allocation held back overall ROAS.
Growth without higher ACoS
Visibility needed to increase without raising the advertising cost percentage.
How Seller AURA approached it
Aligned spend with performance
Bids and budgets were adjusted regularly so spend followed the most effective keywords and campaigns.
Scaled high-performing campaigns
Proven campaigns received additional budget to capture more demand.
Eliminated wasted spend
Negative keywords removed irrelevant traffic and focused budget on terms likely to convert.
Continuous monitoring
Changes were tracked continuously, so campaigns scaled while efficiency improved.
What changed
| Metric | December 2025 | January 2026 | Change |
|---|---|---|---|
| Total sales | $51,090.87 | $61,206.96 | +19.8% |
| PPC sales | $17,848.98 | $37,139.92 | +108% |
| Organic sales | $33,241.89 | $24,067.04 | −27.6% |
| Ad spend | $3,429.36 | $5,277.90 | +53.9% |
| ACoS | 19.21% | 14.21% | −5.0 pts |
- Total sales grew by more than $10,000 in a single month.
- ACoS fell from 19.21% to 14.21% even as ad spend increased.
- As advertising took on more of the growth, part of the demand shifted from organic to paid within the month. Total revenue still grew.
- Across March 2021 to December 2025, the account generated $2,877,575.08 in ad sales from $292,606.68 in spend: ROAS 9.78 at 10.23% ACoS.
Straight from the account
Unedited screenshots from Amazon Seller Central, the Advertising Console and the account's reporting tools, with date ranges left visible.
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