Amazon Antitrust: Who Really Controls the Marketplace?
For an Amazon seller, antitrust can sound like a subject for lawyers and regulators. In practice, the disputes around Amazon reach directly into very ordinary commercial questions: who gets visibility, how pricing outside Amazon can interact with marketplace position, what happens when a platform also competes inside the market it operates, and what it means when thousands of businesses depend on one gateway to reach customers.
That is why Amazon antitrust should not be read as political or legal news detached from commerce. It is a dispute about the rules of the market sellers already operate inside.
The FTC lawsuit: the issue is not simply Amazon’s size
In September 2023, the U.S. Federal Trade Commission initially filed a 172-page antitrust lawsuit against Amazon together with the attorneys general of 17 states.
The FTC alleged that Amazon used exclusionary tactics to maintain market power and weaken competition. Among the issues raised were the relationship between prices outside Amazon and marketplace mechanisms that can affect merchant visibility.
The word “alleged” matters. A lawsuit is not a court judgment proving every allegation. But the fact that these mechanisms became part of a federal antitrust case of this scale shows that questions around the Featured Offer, external pricing and platform power are not merely operational details between Amazon and individual sellers.
Why does the Featured Offer matter in an antitrust debate?
The Featured Offer, historically known as the Buy Box, controls the default purchase path on a product page. When access to that position depends on rules set by the platform, those rules can have substantial economic consequences for merchants.
The regulatory question becomes more sensitive when the effects are not confined to Amazon itself. If pricing on an independent website or another marketplace can affect a seller’s visibility on Amazon, the question becomes broader: can the rules of one dominant marketplace influence price competition outside that marketplace?
That is the type of issue that turns the Featured Offer from an Amazon merchandising feature into a wider competition-policy question.
Europe: the antitrust track came before the DMA
The European regulatory chronology matters because two different enforcement tracks are easy to conflate.
In 2020, the European Commission pursued an antitrust investigation into Amazon that concerned, among other issues, the criteria used for the Buy Box and Prime. That was a competition-law investigation, not a DMA case.
In December 2022, the Commission accepted legally binding commitments from Amazon in relation to those competition concerns. Those commitments belonged to the earlier antitrust process and should be understood separately from the DMA framework that followed.
For sellers and brands, the commercial issue was already familiar: when a marketplace controls key visibility and fulfilment criteria while also participating in the market, the design of those rules can affect which offers reach customers most effectively.
The DMA created a separate enforcement track
Amazon was later designated as a DMA gatekeeper for Amazon Marketplace and Amazon Advertising, with the applicable DMA obligations taking effect from 7 March 2024.
For violations, the DMA framework allows fines of up to 10% of a company’s total annual worldwide turnover. But the importance of the regime is not the penalty figure alone. The EU treats designated gatekeepers as critical digital access points whose conduct can affect businesses that depend on them to reach customers.
The Commission later took investigatory steps concerning Amazon marketplace ranking practices and possible own-brand preferencing. Those steps should not be described as a final finding of wrongdoing, nor should they be conflated with the Commission’s earlier Buy Box and Prime antitrust investigation.
From a commercial perspective, the underlying concern is straightforward. If a platform determines how offers are ranked while also participating in the market, sellers and brands have a direct interest in whether those visibility rules treat competing offers fairly.
Germany illustrates a slower problem: law moves more slowly than algorithms
In 2013, Germany’s Bundeskartellamt prohibited Amazon’s contractual price-parity clause, which had explicitly prevented merchants from offering lower prices through other channels.
After the written clause disappeared, the debate shifted toward algorithmic mechanisms that monitor prices and can affect Featured Offer eligibility. Andreas Mundt, president of the Bundeskartellamt, discussed the difficulty of keeping up with these developments, while competition-law expert Thomas Höppner criticized the time regulators were taking to establish firm rules in a market of this scale.
The structural problem is clear. A contract can be read, challenged and litigated clause by clause. An algorithm can change rapidly, and its economic effect may appear as market behavior rather than as one explicit legal sentence.
Why should a seller care if it is not going to court?
Because the outcome of platform-power disputes can affect the commercial environment the seller depends on.
Competition cases touch issues such as:
- access to the Featured Offer;
- the relationship between marketplace visibility and prices outside Amazon;
- the platform’s role when it also competes inside the marketplace;
- the obligations imposed on gatekeepers that businesses rely on for customer access.
A seller does not need to become an antitrust lawyer. But it does need to understand that marketplace rules are not necessarily permanent or beyond challenge. They sit inside an ongoing argument over what a platform can do when its market position becomes powerful enough to affect competition more broadly.
Platform dependency turns regulation into a commercial issue
The more a business depends on Amazon, the more important changes in marketplace rules become.
A company with several functioning channels can absorb a regulatory or algorithmic shift more easily than one whose demand passes through a single gateway. This is where antitrust and channel strategy intersect.
The relevant question is not only, “Is Amazon powerful?” It is: what does it mean for your business to depend on a marketplace that is itself the subject of regulatory disputes over how that power is used?
Why this debate also reaches consumer prices
Competition economist Fiona Scott Morton connects platform rules to a wider pricing question. Her argument is that if a high-fee platform can effectively prevent a seller from offering lower prices through cheaper channels, the platform can help establish a higher price floor across the broader market.
Thomas Höppner goes further, arguing that Amazon’s system is designed in a way that makes products more expensive.
These are expert economic arguments, not a blanket finding that every product on Amazon costs more. Their importance lies in explaining why regulators view platform competition as more than a dispute between corporations. The rules can also affect the final price paid by consumers.
Market reality: antitrust here is about margin, visibility and distribution
For sellers and brands, the most relevant part of antitrust is not the legal vocabulary. It is the commercial outcome.
Can a company price freely across channels? Is competition for visibility fair? Can one marketplace become so important that lower-cost alternatives struggle to compete? Can a platform’s own commercial role create conflicts with the businesses that depend on it?
Those are not abstract legal questions. They are marketplace-economics questions.
That is why the FTC lawsuit, the EU’s antitrust and DMA enforcement tracks, and national competition investigations matter to Amazon businesses: they concern the architecture of the market in which those businesses make pricing, distribution and growth decisions every day.
FAQ
Why did the FTC sue Amazon in 2023?
The FTC alleged that Amazon used exclusionary tactics to maintain market power and weaken competition, including practices connected to pricing, algorithms and platform power. Those allegations should be distinguished from a final court judgment.
What does the Digital Markets Act have to do with Amazon sellers?
Amazon was designated as a DMA gatekeeper for Amazon Marketplace and Amazon Advertising, with the applicable obligations taking effect from 7 March 2024. Its commercial relevance comes from regulating the conduct of platforms that have become major access points between businesses and customers.
Are all antitrust claims against Amazon proven facts?
No. A lawsuit, a formal investigation, a court judgment and an expert opinion are different things. Allegations and investigations should not be presented as final findings.