On 26 September 2023 the US Federal Trade Commission and seventeen state attorneys general sued Amazon, alleging that punitive algorithms, Prime bundling and advertising auction mechanics unlawfully maintain monopoly power in online retail.
The significance is not only that a giant is being sued. The case treats internal platform design — search ranking, the Buy Box, ad placements, seller ratings — as potentially exclusionary conduct. For businesses dependent on platform traffic, it is a regulatory signal worth reading.
The logic of the allegations
The core logic is that the platform is simultaneously marketplace, rule-maker and competitor. Where Amazon’s own retail business competes with third-party sellers on the same page, the platform can use algorithms and rules to steer traffic toward outcomes more favourable to itself.
The alleged “punitive algorithm” lowers search ranking for sellers who offer lower prices elsewhere. This restricts pricing freedom and weakens cross-platform competition.
Prime bundling is said to tie logistics, traffic and membership benefits, raising the cost of using alternative fulfilment. The advertising auction is said to convert organic traffic into paid traffic, forcing sellers to keep spending for visibility.
Compliance boundaries for platform rules
For platforms, the case suggests three boundaries. First, whether rules are transparent and predictable, so sellers understand ranking and traffic allocation. Second, whether rules treat sellers equally, without hidden preference for own retail. Third, whether rules restrict sellers’ pricing and sales freedom on other channels.
Similar boundaries appear in the EU Digital Markets Act. Designated gatekeepers may not restrict business users from offering better conditions elsewhere, and may not self-prefer in ranking. The wording differs, but the direction converges.
Lessons for cross-border e-commerce
First, do not place all traffic with a single platform. Higher channel concentration means greater exposure to rule changes. Second, preserve pricing autonomy. Where platform contracts or policies restrict cross-channel pricing, assess legality and commercial cost. Third, understand the relationship between advertising and organic traffic, and build a sustainable spending model rather than buying visibility indefinitely. Fourth, retain records of rule changes, account penalties and communications for appeals or litigation.
For brands, platform rule changes also affect trademark protection, counterfeit control and distributor management. Platform governance belongs in the brand compliance system, not only with the operations team.
The Chinese comparison
China’s platform antitrust enforcement has strengthened since 2021, with attention to “choose one of two”, algorithmic price discrimination and self-preferencing. The 2023 legislative plan includes revision of the Anti-Unfair Competition Law, where platform rules, data competition and traffic allocation may be focus areas.
Companies operating both domestically and abroad need to understand different regulatory logic rather than transplanting one jurisdiction’s experience to another.
For platform agreements and merchant relationships, see our commercial contracts service; for cross-border operations and multi-jurisdiction compliance, see multi-jurisdiction; for platform disputes, see commercial disputes.
This article is based on the US Federal Trade Commission’s litigation filed on 26 September 2023. It is for reference only and does not constitute legal advice.