The US Federal Trade Commission, joined by 22 state attorneys general, has filed a lawsuit against Amazon, alleging the e-commerce giant engaged in a scheme to secretly upcharge companies for advertising on its platform. The coordinated legal action claims that Amazon misled advertisers regarding the pricing and terms of its ad placements, effectively extracting undisclosed surcharges from brands seeking visibility in its marketplace.

The lawsuit strikes at one of the most lucrative segments of Amazon’s business model. Over the past decade, the company has transformed its retail platform into a dominant digital advertising network, compelling merchants to pay for sponsored placements to remain competitive in search results. According to the allegations, the mechanics of this pricing were not transparently disclosed to the advertisers footing the bill. The legal challenge represents a significant escalation in ongoing regulatory efforts to scrutinize the operational practices of major technology platforms.

The mechanics of marketplace visibility

Amazon’s advertising business has evolved from a supplementary revenue stream into a central pillar of its profitability. For brands and third-party sellers—ranging from independent merchants to multinational fashion conglomerates—purchasing ad space on the platform is rarely viewed as optional. It is a structural requirement for maintaining product visibility in an increasingly crowded digital storefront. The FTC’s allegations suggest that Amazon leveraged this dependency, implementing pricing structures that obscured the true cost of customer acquisition.

The core of the dispute centers on the asymmetry of information between the platform and its advertisers. Retail media networks operate as closed ecosystems where the platform controls both the point of sale and the algorithmic distribution of visibility. If the allegations of secret upcharging hold true, it indicates a market dynamic where advertisers were unable to accurately calculate their return on ad spend. This lack of transparency not only affects individual brand margins but also distorts the broader competitive landscape within the marketplace, as merchants may have been unknowingly bidding against artificially inflated price floors.

Regulatory pressure on retail media networks

The involvement of 22 state attorneys general alongside the FTC, the primary US antitrust and consumer protection agency, underscores a unified regulatory focus on digital advertising monopolies. Historically, regulatory scrutiny of e-commerce giants has concentrated on consumer pricing and anti-competitive behavior toward rival platforms. This lawsuit, however, pivots the focus toward the business-to-business relationships that sustain the platform economy. By challenging how Amazon charges its own merchants, regulators are probing the structural leverage that dominant marketplaces hold over their suppliers.

For the broader retail and fashion industries, the outcome of this litigation could prompt a reevaluation of digital marketing allocations. Brands have increasingly diverted advertising budgets away from traditional media and toward retail media networks, drawn by the promise of high-intent consumer traffic. If the FTC successfully demonstrates that Amazon’s ad pricing was deceptive, it may force a structural unbundling of how retail media networks report metrics and charge for placements. Such a shift would likely demand greater auditability and transparency, altering the operational standards for digital marketplaces globally.

As the legal proceedings advance, the focus will remain on the specific mechanisms Amazon used to calculate and communicate its advertising costs. The case tests the boundaries of platform governance and the extent to which dominant marketplaces can dictate terms to their captive merchant bases without regulatory intervention.

With reporting from Business of Fashion, CNBC Technology, WWD.

Source · Business of Fashion