How Dynamat Removed Unauthorized Sellers and Grew Online Revenue by 30%
Unauthorized seller removal is a critical challenge for brands selling across online marketplaces like Amazon and Walmart. Learn more about Amazon’s policies on unauthorized sellers ↗ and Walmart’s seller guidelines ↗
When listings get out of control, the damage adds up fast: inconsistent pricing, margin erosion, and strained dealer relationships follow.
This case study shows how Dynamat eliminated unauthorized sellers on Amazon, restored marketplace control, and increased online revenue by 30% within months.
When Dynamat began working with Sigil, their Amazon presence had become fragmented and unmanageable. Unauthorized sellers dominated listings, prices varied wildly across the marketplace, and even top dealers were abandoning the brand because they could not maintain margin.
At kickoff, Dynamat faced:
- Nearly 800 Amazon sellers
- Over 3,000 different prices online for the same products
The Clean-Up Phase: Unauthorized Seller Removal and MAP Enforcement
Over the next 90–120 days, Dynamat and Sigil partnered to rebuild the brand’s pricing foundation. This began with the launch of Dynamat’s first MAP policy and continued with a comprehensive seller-level enforcement program across Amazon, with additional enforcement on Walmart and eBay.
Rather than chasing individual listings, the strategy focused on removing bad actors at the seller account level and shutting down sources of product leakage.
“Success requires a full commitment from the brand. You have to support it across the entire organization. One of the key factors in our success was that we truly went all in, approaching it from every angle, day and night. This isn’t something you can do halfway. If you do, that’s exactly what you’ll get in return.”
— Scott Monnin, Dynamat CEO
The Results
As a direct result of this enforcement strategy, Dynamat achieved:
100%
0
30%
“If you can’t protect your price, your product gets devalued. Sigil helped us eliminate that issue. We’re down to two sellers today. That’s hugely impressive.”
— Scott Monnin, Dynamat CEO
Ongoing Marketplace Monitoring and Escalation
Enforcement does not end once unauthorized sellers are removed. Marketplaces shift constantly, and maintaining control requires continuous vigilance.
Today, Sigil’s monitoring alerts Dynamat the moment any new seller attempts to undercut MAP or relist restricted products, ensuring unauthorized seller removal is maintained continuously. Most violations are shut down quickly, leaving only a small number of low-impact actors that are addressed as they appear.
“There’s a settling-out period, but we’re now seeing real stability.”
— Scott Monnin, CEO, Dynamat
Unauthorized seller removal on Amazon is a process, not a one-time fix.
Why This Enforcement Strategy Works
“We’ve had a wonderful working relationship. We felt like Sigil has been an extension of Dynamat and hopefully vice versa as well. The personal relationship side of it has been the best part of this whole process.”
— Scott Monnin, CEO, Dynamat
A Sustainable Brand Protection System
With a clean Amazon marketplace and consistent pricing restored, Dynamat now benefits from stronger dealer relationships and a more competitive position across channels. The brand is using its restored margin structure to rebuild partnerships that were previously lost.
“Now we’re using that margin to win customers back.”
— Scott Monnin, CEO, Dynamat
What was once a fragmented, price-eroded Amazon presence is now a stable, controllable online environment. This proves that even severe marketplace disruption can be reversed within months with the right enforcement approach.
Facing the Same Challenge?
Dynamat’s experience is not unique. Many brands reach out after seeing their Amazon listings overrun by unauthorized sellers, inconsistent pricing, and eroding dealer trust.
If you are dealing with similar issues, Sigil helps brands regain control through seller-level enforcement, continuous monitoring, and long-term marketplace strategy. The goal is not short-term cleanup, but a system that holds over time.
Learn how Sigil helps brands remove unauthorized sellers on Amazon and restore marketplace control ↗