How SalesDuo Helped TNG Worldwide Scale Across Vendor Central and Seller Central

TNG Worldwide manages a portfolio of beauty, personal care, and professional products on Amazon, including brands such as ForPro Professional Collection and Ginger Lily Farms.

When TNG started working with SalesDuo in 2020, the company was already selling through both Amazon Vendor Central and Seller Central. Managing both channels, however, came with several challenges.

TNG faced inconsistent purchase orders, product availability and buyability issues, blocked ASINs, limited Prime coverage on some Seller Central offers, different profitability levels across channels, and supply chain disruptions during COVID-19.

SalesDuo worked across TNG's Amazon account instead of focusing on advertising alone. The goal was to keep products available, fix catalog and compliance issues, decide which selling and fulfillment channel worked best for each product, support new-product launches, and use advertising as part of the wider growth plan.

TNG Worldwide Amazon Growth Snapshot

The Challenge: Managing Growth Across Vendor Central and Seller Central

TNG was not dealing with just one Amazon problem.

Its products were spread across Vendor Central, Seller Central Fulfilled by Merchant, and Fulfilled by Amazon. As a result, availability, profitability, inventory, fulfillment, and catalog issues could affect each channel differently.

One of the main problems was inconsistent purchase orders through Vendor Central. Some products also faced availability and buyability issues.

Seller Central gave TNG another way to keep products available. However, FBM offers did not always provide the Prime experience TNG wanted to maintain.

The account also faced blocked ASINs and compliance issues related to product documents and listing eligibility. COVID-19 made things harder by disrupting supply chains and causing major changes in demand.

Instead of managing Vendor Central and Seller Central as two separate businesses, SalesDuo treated them as parts of the same Amazon growth strategy.

For a broader explanation of how these two models differ, see our guide to Vendor Central vs Seller Central.

Improving Availability Across the Amazon Account

SalesDuo first focused on keeping TNG's products available to customers.

On the Vendor Central side, the team addressed exclusion-related issues affecting product availability and purchase orders.

TNG already had processes for sending inventory into Seller Central. This gave the company another way to keep products in stock when Vendor Central could not fully support demand.

Using both channels gave the team more options.

Instead of depending on one Amazon channel, SalesDuo could review each product and decide whether Vendor Central, Seller Central/FBA, or a mix of both made the most sense.

Fixing Catalog and Compliance Issues

Keeping products in stock was only part of the problem. Customers also needed to be able to buy them.

SalesDuo addressed blocked ASINs and other catalog issues affecting TNG's product range.

During the engagement, the account faced several types of issues, including compliance concerns, product-condition complaints, late-shipment issues, A-to-Z claims, and document requirements related to safety data and imports.

TNG's internal team also helped update product content and creative assets.

Where it made sense, SalesDuo recommended variation structures to organize related products more clearly within the Amazon catalog.

The goal wasn't to make one listing change at a time. The team addressed the account issues that were preventing products from staying available and buyable.

Using Seller Central and FBA When the Economics Made More Sense

As TNG's Amazon business grew, profitability became another major factor.

Changes in manufacturing, freight, and other costs meant Vendor Central was not always the best option for every product.

SalesDuo reviewed which products could perform better through Seller Central and FBA.

FBA allowed TNG to maintain Prime-eligible fulfillment while giving the business another way to sell products that no longer made as much financial sense through Vendor Central. The existing case study also notes that several products performed strongly after moving to FBA.

This didn't mean every product was moving away from Vendor Central for good.

The goal was to choose the right channel for each product based on profitability, inventory, customer experience, and sales performance.

Brands considering a more permanent channel change can also read our guide to moving from Vendor Central to Seller Central/FBA.

Supporting New Product Launches

TNG continued adding new products while SalesDuo managed the Amazon account.

For eligible launches during the period covered by the case study, the strategy included Amazon Vine, variation planning, content and creative work, inventory planning, and advertising support.

SalesDuo also reviewed how products performed after launch, rather than using the same approach for every new item.

Performance and profitability helped determine which Amazon channel made the most sense for each product over time.

This mattered in a hybrid account. A product that worked well through Seller Central/FBA at launch did not always need to stay there permanently.

Using Advertising as One Part of the Growth Strategy

Advertising supported TNG's Amazon growth, but it was not the entire strategy.

During the historical engagement, SalesDuo used Sponsored Products and other Amazon ad formats to support key products and new launches. Advertising worked alongside improvements in availability, catalog management, inventory planning, pricing, creative, and channel decisions.

This case study focuses on how SalesDuo managed TNG's wider Amazon account across Vendor Central and Seller Central.

For a closer look at TNG's advertising strategy and new-to-brand growth, read the dedicated TNG Worldwide Amazon advertising case study.

You can also learn more about current Amazon ad types and SalesDuo's Amazon advertising management.

Moving Products Between FBA and Vendor Central

The TNG account showed that the right Amazon channel for a product can change over time.

Some products worked better through FBA when Vendor Central availability or profitability made Seller Central the better option.

Later, changes in unit volume and manufacturing costs allowed some products to move back toward Vendor Central.

This flexibility meant TNG did not have to choose between Vendor Central and Seller Central as a permanent either-or decision.

SalesDuo could review each product's costs and operating conditions and adjust the channel strategy when needed.

What SalesDuo's Work With TNG Worldwide Shows

SalesDuo's work with TNG went far beyond advertising.

The team worked across several connected parts of the Amazon business:

• Vendor Central availability and purchase-order issues
• Seller Central and FBA strategy
• Product buyability
• Blocked ASIN and compliance support
• Catalog and variation management
• Product content and creative
• New-product launches
• Inventory and profitability considerations
• Amazon advertising

The hybrid approach lets SalesDuo manage these areas together, rather than treating each as a separate problem.

A catalog issue could affect advertising. An availability problem could reduce sales. Poor channel economics could hurt profitability even when demand was strong. A fulfillment decision could also affect Prime availability.

Managing these areas together gave TNG more flexibility in how it ran its Amazon business.

A Hybrid Amazon Model Requires More Than Advertising

TNG's experience shows why brands selling through both Vendor Central and Seller Central may need account-level management rather than separate tactics for each channel.

The right choice can vary from one product to another.

One ASIN may work better through Vendor Central. Another may be better suited to Seller Central/FBA because of profitability, inventory, or fulfillment needs. That decision can also change as costs, demand, and business conditions change.

Amazon growth therefore depends on managing catalog health, availability, compliance, fulfillment, product costs, launches, content, and advertising together.

Looking for Full-Service Amazon Account Management?

SalesDuo helps brands manage the day-to-day operations and growth challenges of selling on Amazon.

Our full-service Amazon account management support covers the connected areas that can affect performance across Seller Central and Vendor Central, including catalog operations, availability, content, advertising, account health, and growth planning.

You can also explore more SalesDuo Amazon case studies to see how we have worked with brands facing different Amazon growth challenges.

Book Your 1:1 Growth Call with SalesDuo.

These results describe a specific historical engagement and are not a promise of future performance.

About the Author

Meet Srushti P. Borle, an SEO Content Writer Intern at SalesDuo who enjoys turning complex ideas into clear, easy-to-read content. She focuses on creating smooth, engaging content that readers can understand and enjoy. Outside of work, she loves reading, exploring new ideas, and finding simple ways to present detailed topics.