Amazon’s Million-Dollar Sellers Revolt Over Margin-Squeezing Ad Changes

Why Amazon’s Top Sellers Are Pushing Back on Ad Platform Changes

Amazon’s most valuable third-party sellers are in open revolt over a wave of platform changes they say are squeezing their margins and wresting control of where their ads appear. The discontent is being channeled through Million Dollar Sellers (MDS), a group representing merchants who generate at least $1 million in annual sales on the marketplace.

The sellers’ grievances are mounting. Among the most contentious moves: Amazon is pushing advertisers’ campaigns onto off-network sites and apps with only limited ability to opt out—a practice familiar to brands that have long dealt with Google and Meta’s opaque placement controls. At the same time, the company has introduced AI-assembled ad creative, including chatbot-placed ads, which sellers cannot reject or customize, leaving them with no say over how their products are marketed.

The frustration recently boiled over into a boycott that forced Amazon to delay a plan to stop accepting credit card transactions—a tactical win that emboldened the group but did little to address the deeper margin pressures. MDS members argue that the cumulative changes are turning a once-profitable channel into an uphill battle, with rising fees, payment delays, and a loss of control over their own brand messaging.

How Amazon’s Ad Policy Shift Erodes Seller Margins and Control

Amazon’s Push Into Off-Network Inventory

Amazon’s decision to funnel seller ads beyond its own site is driven by the need to expand its advertising inventory and compete with the duopoly of Google and Meta. By forcing campaigns onto third-party sites, the platform can charge for impressions it would otherwise miss—but it does so by overriding seller preferences. The limited opt-out option means many merchants are paying for placements they never chose, often on sites they cannot vet for brand safety. This mirrors tensions seen across ad tech, where platforms claim transparency while limiting true control.

The Margin Squeeze From AI-Assembled Creative

The introduction of AI-generated ads—including those placed inside Amazon’s shopping chatbot—compounds the loss of control. Sellers accustomed to carefully crafted brand campaigns now find their products represented by machine-generated copy and visuals they did not approve. While Amazon pitches this as an efficiency gain, the sellers see it as a direct threat to their margins, as they still pay for the ads but lose the ability to differentiate or protect brand integrity. For merchants whose businesses rely on that differentiation, this is an existential risk.

Can Collective Action Shift the Balance?

The MDS boycott over credit card payments proved that organized sellers can force concessions. Amazon, however, holds immense leverage: its marketplace accounts for a huge share of many sellers’ revenue, making individual defection costly. The company is unlikely to reverse core advertising changes, but it may adjust policies incrementally to avoid a full-scale exodus. The real question is whether sellers can build sustained pressure that alters the platform’s long-run approach to monetising its marketplace, or whether this revolt will fade like many previous user pushbacks against big tech platforms.

What Amazon Sellers Can Do Now to Protect Their Businesses

• Join or form seller collectives. The MDS boycott’s success in delaying the credit card change shows that collective bargaining can extract concessions from Amazon—even if temporary. Sellers should pool resources to negotiate as a bloc.
• Audit off-network ad performance rigorously. Since Amazon limits exclusion options, sellers must track where their ads are actually running, measure conversion quality from those placements, and adjust budgets away from underperforming or brand-risky inventory where possible.
• Diversify sales channels proactively. Overdependence on Amazon amplifies vulnerability. Even modest investments in direct-to-consumer sites, Walmart Marketplace, or social commerce can reduce the platform’s bargaining power over individual sellers.
• Press for creative control guardrails. In communications with Amazon and through industry groups, sellers should demand clear, enforceable opt-outs for AI-generated ad formats—especially those appearing in conversational interfaces—and transparent reporting on how those formats impact their margins.