Slobproof offered a strong product that met a clear customer need and had growing potential on Amazon. But its advertising setup was scattered. There were too many campaigns running at once, money was going to low-return traffic, and ACoS had climbed to 31.15%.
SalesDuo stepped in to reorganize the account, implementing a clearer, more controlled Amazon advertising strategy.
TL;DR: In nine months, SalesDuo increased Slobproofโs Amazon US ad sales by 32%, reduced ad spend by 31%, and improved ACoS from 31.15% to 16.34%. Those ACoS figures imply an estimated increase in ROAS from approximately 3.21x to 6.12x; verify the ROAS values against the account export before publication.
This case study shows how Slobproof increased sales while spending less by consolidating campaigns, checking performance every 2 hours, tightening budget controls, and adding inventory safeguards.
Case Study Snapshot
| Area | Details |
|---|---|
| Client | Slobproof |
| Product Focus | Slobproof Refillable Touch-Up Paint Pen |
| Marketplace Focus | Amazon US |
| Business Type | Woman-owned small business |
| Main Challenge | Fragmented campaigns, wasted spend, and high ACOS |
| Starting ACOS | 31.15% |
| Ending ACOS | 16.34% |
| ACOS Improvement | 47.50% improvement |
| US Ad Sales Growth | 32% increase |
| US Ad Spend Change | 31% decrease |
| Campaign Reduction | Approx. 67% fewer campaigns |
| Optimization Cadence | Every 2 hours |
| Time Period | Nine months |
| Additional Marketplace Results | Canada ad sales up 162%; UK ad sales up 102% |
About Slobproof
Slobproof is a woman-owned small business founded by Debbie Wiener, an award-winning interior designer and mom. The brand was created from a simple household problem: everyday paint touch-ups were messy, stressful, and harder than they needed to be.
The main product, the Slobproof Refillable Touch-Up Paint Pen, offers homeowners a cleaner way to handle small wall repairs and paint touch-ups. Unlike typical single-use tools that dry out fast or have poor flow control, the patented Slobproof pen is designed for cleaner, more precise DIY paint fixes.
The brand reports more than 2 million pens sold worldwide. But on Amazon US, the advertising account needed a more focused structure to support profitable growth.
Slobproof did not simply need to spend more. It needed to spend with more control.
The Challenge: Fragmented Campaigns and Wasted Ad Spend
When SalesDuo took over the account in May, the team found a common problem many growing Amazon brands face: too many campaigns running at once.
Slobproof was running over 100 active campaigns simultaneously. This made it hard for the team to quickly see which campaigns were driving sales, wasting money, or needed more budget.
The issue wasnโt only the number of campaigns. The bigger problem was that the budget was spread across campaigns, search terms, and clicks that didnโt consistently lead to sales.
Too Many Campaigns Made Performance Hard to Read
With over 100 campaigns running, the account was too complex. Some campaigns delivered good results, but others exhausted the budget without generating enough sales.
When an account is too scattered, itโs harder to trust the data. The budget gets split in too many directions, making it tough for the team to see which campaigns are actually driving growth.
SalesDuoโs first step was to simplify the structure to measure and improve performance with greater confidence.
Low-Intent Traffic Was Draining Budget
The account was also wasting ad spend on campaigns and traffic that produced too few orders.
This type of wasted ad spend can quietly damage Amazon advertising performance. Even if total sales look stable, inefficient clicks can push ACoS higher and reduce the return from every advertising dollar.
For Slobproof, SalesDuo needed to identify where budget was being wasted and move that spend toward campaigns, keywords, and products with stronger conversion potential.
ACOS Needed Immediate Control
Before SalesDuoโs optimization work, Slobproofโs ACoS stood at 31.15%. That meant a significant share of ad-attributed revenue was being spent on advertising.
The goal wasnโt just to lower ACoS by cutting spending. Cutting spend without a plan can reduce visibility, hurt sales, and slow growth.
The real goal was to make Amazon advertising more efficient by cutting waste, protecting high-performing traffic, and building a structure that could support stronger sales with better cost control.
SalesDuoโs Amazon Advertising Strategy for Slobproof
SalesDuo based Slobproofโs Amazon advertising strategy on a simple idea: remove waste before trying to scale.
Rather than managing the account passively or making broad budget cuts, the team used a focused approach: consolidating campaigns, frequently checking bids, reallocating budget, and adding inventory safeguards.
1. Consolidated the Campaign Structure
The first major change was a structural overhaul.
SalesDuo reduced the campaign count by approximately 67%, keeping only those with a stronger conversion history and clearer performance value.
This made the account easier to manage and easier to scale. With fewer campaigns competing for budget, the team could see performance patterns more clearly and make faster decisions.
Campaign consolidation also helped prevent budget from being spread too thin. Instead of funding too many low-value campaigns, Slobproofโs ad spend could be redirected toward the campaigns most likely to generate profitable sales.
This created a cleaner foundation for Amazon ad spend optimization.
2. Removed Wasted Spend From Low-Return Traffic
After simplifying the account, SalesDuo focused on wasted spend.
The team reviewed campaign performance, search term activity, ACoS, conversion behavior, and spend patterns to identify areas where ads were generating clicks without sufficient return.
SalesDuo used search-term- and campaign-level performance data to isolate spend that generated clicks but did not drive sufficient sales. The team then reduced bids, paused persistently inefficient targets, and added negative keywords where search terms showed weak purchase intent.
This step was important because reducing ad spend alone does not always improve performance. The key is knowing which spend to reduce.
For Slobproof, SalesDuo focused on eliminating spend that was not helping the account grow.
3. Used a 2-Hour Optimization Pulse
SalesDuo did not rely on a set-and-forget campaign setup.
The team used a high-frequency optimization process, checking performance every two hours. These checks included manual and tool-assisted reviews of bids, budget movement, conversion rates, and ACoS benchmarks.
At each two-hour review, the team compared spend, ad-attributed sales, conversion rate, and ACoS against campaign-level targets. When a campaign exceeded its target ACoS without sufficient conversions, bids or budgets were reduced; when a campaign remained within target and converted efficiently, budget was protected or increased.
This made the account more responsive throughout the day.
If certain keywords or campaigns were performing well during peak shopping hours, the budget could be reallocated to them more quickly. If other areas were spending without enough return, action could be taken before too much budget was wasted.
This approach gave Slobproof greater control over daily ad spend and enabled the team to manage performance with greater precision.
4. Reallocated Budget Toward Stronger Opportunities
Once SalesDuo had clearer campaign data, the next step was to reallocate the budget.
Instead of giving every campaign the same support, SalesDuo reallocated funds to campaigns and keywords with stronger sales signals. Lower-performing areas received less funding, while higher-performing areas were protected and supported.
This helped Slobproof reduce Amazon PPC costs while continuing to grow ad sales.
The result was not a simple cost cut. It was a smarter budget mix.
By moving budget away from inefficient traffic and toward higher-converting opportunities, SalesDuo helped Slobproof improve ad efficiency without reducing the accountโs ability to generate sales.
5. Controlled ACOS With Smarter Bid Management
Bid management played a key role in the turnaround.
SalesDuo adjusted bids using observed campaign performance rather than assumptions. Bids were lowered where traffic costs were high or conversion rates were low. Higher-performing keywords and campaigns received additional support when the projected return justified the investment.
This helped control ACoS while keeping the account active in areas that mattered.
The goal was not to chase the cheapest clicks. The goal was to get the right clicks at the right price.
That distinction helped Slobproof lower Amazon ACoS from 31.15% to 16.34%
6. Protected Growth With Inventory Safeguards
Sales growth only matters if the product stays in stock.
To prevent advertising growth from creating inventory issues, SalesDuo implemented an automated inventory check system focused on 12-week coverage. The team reviewed sell-through patterns across 6-, 12-, and 18-week windows.
SalesDuo compared current inventory with trailing sell-through across 6-, 12-, and 18-week windows, using 12 weeks as the primary coverage target. When projected coverage approached the risk threshold, the team adjusted advertising pressure or replenishment planning before a stockout occurred.
This helped protect the account from stockout risk.
On Amazon, going out of stock can stop Sponsored Products from serving and interrupt sales momentum until inventory is restored.
By combining advertising optimization with inventory planning, SalesDuo helped Slobproof support demand without risking product availability.
The Results: Higher Ad Sales With Lower Ad Spend
By December, Slobproofโs Amazon US account had become significantly more efficient.
SalesDuo helped the brand increase ad sales by 32% while reducing ad spend by 31% over a nine-month period. ACOS improved by 47.50%, moving from 31.15% to 16.34%.
| Performance Metric | Before SalesDuo | After SalesDuo | Result |
|---|---|---|---|
| US Ad Sales | Baseline | +32% | 32% increase |
| US Ad Spend | Baseline | -31% | 31% decrease |
| ACOS | 31.15% | 16.34% | 47.50% improvement |
| Campaign Count | 100+ active campaigns | Approx. 67% fewer campaigns | Cleaner account structure |
| Optimization Cadence | Passive / fragmented setup | Every 2 hours | Faster bid and budget control |
| Inventory Planning | Not specified | 12-week coverage checks | Lower stockout risk |
The strongest result was the double win: sales increased while spend decreased.
That is what made this Amazon advertising case study important. Slobproof did not grow by simply spending more. It grew because the budget was used more carefully.
International Results: The Framework Scaled Beyond the US
The success was not limited to Amazon US.
SalesDuo applied the same expert-led framework across other marketplaces and saw strong results internationally.
| Marketplace | Result |
|---|---|
| Canada | Ad sales increased 162%, while ad spend increased only 6% |
| Canada | ACOS reduced by 60% |
| United Kingdom | Ad sales increased 102% |
| United Kingdom | ACOS improved by 32% |
These results showed that the framework could scale across marketplaces. Campaign consolidation, two-hour optimization checks, disciplined budget reallocation, and tighter spend control supported performance in the US, Canada, and the United Kingdom.
Together, these changes created a cleaner, more responsive advertising system that scaled across the US, Canada, and the United Kingdom.
Key Takeaways for Amazon Brands
- Simplify fragmented campaign structures before increasing budgets.
- Reallocate spend toward keywords and campaigns with proven conversion signals.
- Pair advertising optimization with inventory monitoring so growth does not create stockout risk.
How SalesDuo Can Do the Same for Your Brand
If your Amazon ad spend is rising but performance is not improving, the issue may not be your budget. It may be how that budget is being used.
SalesDuo helps Amazon brands reduce wasted spend, improve campaign structure, lower ACoS, strengthen advertising efficiency, and scale with better control. Our team combines Amazon PPC management, Amazon Advertising strategy, budget optimization, and operational checks to help brands grow without losing focus on profitability.
Slobproofโs results show what can happen when Amazon advertising is managed with sharper structure, faster optimization, and stronger spend control.
Book a 1:1 growth call with SalesDuo.
About the Author
Meet Mamta Mathe, an Associate Content Writer at SalesDuo who specializes in creating practical, research-backed content for Amazon sellers. She enjoys simplifying complex eCommerce topics and helping brands make smarter growth decisions through clear, actionable insights. Outside of work, she loves reading, exploring new ideas, and staying updated on digital marketing trends.
