There’s a persistent belief in ecommerce that more products equal more growth. More SKUs means more visibility. More keywords. More shelf space. On Amazon, that logic often breaks down.
In reality, expanding your catalog without structure can do the opposite of what you intend. It can dilute ranking power, fragment demand, create internal competition, and ultimately reduce total revenue.
This isn’t a theoretical issue. It’s something we see repeatedly across brands, especially those transitioning from traditional retail into Amazon.
The Hidden Cost of SKU Expansion
At first glance, adding SKUs feels like growth. You’re offering more options, covering more use cases, and increasing potential entry points for customers. But Amazon doesn’t reward volume. It rewards performance concentration.
When too many SKUs exist within a category or brand, several things start to happen:
- Ranking signals get split across products: Instead of one SKU building strong organic momentum, multiple SKUs compete for the same keywords.
- Conversion rates decline: Customers are presented with too many similar options, which creates friction and reduces purchase confidence.
- Advertising efficiency drops: You’re now spreading budget across multiple listings instead of reinforcing the strongest performers.
- Internal competition increases: Your own products start bidding against each other, driving up CPC without increasing total demand.
- Buy Box instability becomes more likely: More SKUs often means more complexity in pricing, distribution, and reseller activity.
The result is a catalog that looks bigger but performs worse.
Why Amazon Rewards Focus, Not Breadth
Amazon’s algorithm is designed to identify and promote products that convert consistently.
That means it favors:
- High-velocity SKUs
- Strong conversion rates
- Consistent pricing
- Clear demand signals
When your catalog is overly fragmented, you weaken all of these signals.
Instead of building authority around a few high-performing products, you dilute that authority across many underperforming ones.
In other words: you don’t get more growth. You get more noise.
The Real Problem: Catalog Architecture
Most brands don’t struggle because they have too many products.
They struggle because their catalog isn’t structured for how customers actually shop.
This is where SKU count becomes a strategic issue, not just a merchandising decision.
Questions that matter more than “How many SKUs do we have?” include:
- Are multiple SKUs competing for the same keywords?
- Are variations split into separate listings instead of consolidated?
- Are low-performing SKUs draining ad spend?
- Are pack sizes aligned with real purchasing behavior?
- Are duplicate or redundant listings fragmenting ranking signals?
Without answering these questions, adding more SKUs almost always introduces inefficiency.
What Happens When You Simplify the Catalog
Reducing SKU count, when done strategically, doesn’t limit growth. It concentrates it. When a catalog is cleaned up and rationalized:
- Strong SKUs gain more ranking power
- Conversion rates improve
- Advertising becomes more efficient
- Organic visibility increases
- Buy Box control stabilizes
Instead of competing internally, your products begin working together as part of a coordinated system. This is where Amazon starts to behave like a controlled retail channel, not a fragmented marketplace.
A Real Example: Ricola’s Amazon Transformation
A clear example of this dynamic can be seen in the Ricola case study.
Ricola is a globally recognized brand with nearly a century of retail success. But like many legacy CPG companies entering ecommerce, their Amazon presence initially lacked structure and control.
One of the most important steps in their growth wasn’t adding more products. It was doing the opposite.
WBX Commerce worked with Ricola to:
- Merge duplicate ASINs
- Narrow the catalog to the most profitable SKUs
- Eliminate redundant or competing listings
- Align pack sizes with actual purchasing behavior
- Build a cleaner, more focused product structure
This wasn’t about reducing selection for the sake of it. It was about removing inefficiency.
Once the catalog was simplified and aligned, everything else improved. Advertising performance increased, keyword visibility strengthened, Buy Box control improved, and conversion rates stabilized. From there, WBX Commerce used WBX Insights to guide keyword strategy, optimize bidding, and identify products with the strongest halo effect, meaning the SKUs that influenced broader purchasing behavior across the catalog.
The result was not just incremental improvement. Ricola saw a 57% year-over-year increase in Amazon sales after launching its optimized channel.
And that growth didn’t come from adding more SKUs. It came from structuring the right ones correctly.
The Role of Data in SKU Rationalization
Deciding which SKUs to keep, consolidate, or eliminate should never be guesswork. The most effective catalog strategies are built on data, including:
- Keyword performance and search demand
- Conversion rates by SKU
- Buy Box win rates
- Market basket data (what customers buy together)
- Halo behavior (what customers buy after clicking an ad)
- Profitability by product and pack size
In Ricola’s case, this data revealed which products actually drove revenue and which ones created friction. That allowed the team to design a catalog around real customer behavior instead of assumptions.
Why More SKUs Often Signal a Deeper Problem
In many cases, SKU expansion is a reaction to underperformance.
When growth slows, brands often try to:
- Launch new variations
- Add new pack sizes
- Introduce new SKUs to “capture demand”
- Expand into adjacent categories without clear demand signals
- Duplicate similar products instead of consolidating performance
- React to competitor listings instead of strengthening core SKUs
But if the underlying catalog structure is inefficient, adding more products doesn’t solve the problem; it compounds it. Instead of fixing conversion issues, it spreads them.
Instead of improving visibility, it fragments it. This is why SKU growth without strategy often leads to declining efficiency over time.
The Better Approach: Fewer, Stronger SKUs
The highest-performing Amazon brands don’t win by having the most products.
They win by having the most effective catalog.
That means:
- Consolidating where possible
- Eliminating redundancy
- Aligning products with real demand
- Prioritizing high-impact SKUs
- Structuring packs strategically
- Supporting key products with focused advertising
When this is done correctly, each SKU plays a defined role in the system. Nothing is competing unnecessarily. Nothing is draining resources. Everything is working toward growth.
Advertising Doesn’t Fix SKU Problems; It Amplifies Them
It’s important to understand where advertising fits into this. Amazon ads don’t solve catalog inefficiencies. They expose them.
If your SKU structure is fragmented, you’ll end up paying more for traffic and actually convert less of it. You’ll also probably compete with yourself and struggle to scale efficiently. But when your catalog is clean and focused, advertising becomes far more effective. It reinforces strong products instead of trying to compensate for weak ones.
What This Means for Your Amazon Strategy
If your Amazon performance feels inconsistent – rising CPCs, unstable conversion rates, unpredictable growth – it may not be a demand problem. It may be a catalog problem.
Before adding more SKUs, it’s worth asking:
- Are we maximizing the performance of the SKUs we already have?
- Are we concentrating demand or fragmenting it?
- Are we structuring our catalog around how customers actually shop?
- Are our top-performing SKUs receiving the majority of our ad spend and optimization focus?
- Are underperforming SKUs creating inefficiencies in pricing, inventory, or Buy Box stability?
Because in many cases, the fastest way to grow revenue is not expansion. It’s focus.
Conclusion: Growth Comes From Structure, Not Volume
The idea that more SKUs automatically drive more revenue is one of the most common and costly misconceptions in Amazon strategy.
As the Ricola case study demonstrates, real growth comes from:
- Clean catalog architecture
- Strategic SKU selection
- Data-driven decision making
- Controlled marketplace environments
When those elements are in place, fewer SKUs can outperform a much larger catalog.
Because on Amazon, efficiency beats volume.
Ready to Optimize Your Amazon Catalog?
If your brand is adding products but not seeing proportional growth, the issue may not be your advertising; it may be your structure. WBX Commerce helps brands simplify, optimize, and scale their Amazon catalogs using data-driven insights and strategic execution.
Contact WBX Commerce to learn how a more focused SKU strategy can unlock stronger performance, better efficiency, and sustainable growth on Amazon.