August 29, 2026

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The European Post

Policy • Diplomacy • strategic insight

LATEST
What Europe Needs From the GCC Summit Riyadh Will Host in AutumnHolding Limits Still Block a Digital Euro Deal Before DecemberData Rules Agreed With Seoul Now Wait on Parliament’s ConsentChina Listed Fourteen European Firms and November Ends the TruceWhy Australia’s Finished Trade Deal Still Has No Signature DateLate Application Leaves Tokyo Outside the Defence Loan QueueCyber Resilience Rules Give Makers 24 Hours From SeptemberWinter Stocks Test Europe’s New Gas Storage Flexibility RulesInnovation Theory Meets Merger Control in a New Commission StudyMercosur Tariffs Fell in May and the Court Has Not Ruled YetBilaterals III Now Turns on Which Referendum Switzerland PicksDark Patterns Face the EU Digital Fairness ActFifteen Chapters Stand Between Montenegro and 2028Who Blinks First in the FP10 Research Budget FightCustoms Reform Landed in March and Its Data Hub Opens in 2028Victims Rights Gain an EU Helpline and Capitals Have Two YearsIreland Must Move the EU Budget Box Before the October SummitFertiliser Prices Sit 71 Percent Above Their 2024 Average LevelState Aid Exemptions Face a Rewrite With Four Months to SpareIrregular Crossings Fell 37 Percent and Spain Is the ExceptionWhat Europe Needs From the GCC Summit Riyadh Will Host in AutumnHolding Limits Still Block a Digital Euro Deal Before DecemberData Rules Agreed With Seoul Now Wait on Parliament’s ConsentChina Listed Fourteen European Firms and November Ends the TruceWhy Australia’s Finished Trade Deal Still Has No Signature DateLate Application Leaves Tokyo Outside the Defence Loan QueueCyber Resilience Rules Give Makers 24 Hours From SeptemberWinter Stocks Test Europe’s New Gas Storage Flexibility RulesInnovation Theory Meets Merger Control in a New Commission StudyMercosur Tariffs Fell in May and the Court Has Not Ruled YetBilaterals III Now Turns on Which Referendum Switzerland PicksDark Patterns Face the EU Digital Fairness ActFifteen Chapters Stand Between Montenegro and 2028Who Blinks First in the FP10 Research Budget FightCustoms Reform Landed in March and Its Data Hub Opens in 2028Victims Rights Gain an EU Helpline and Capitals Have Two YearsIreland Must Move the EU Budget Box Before the October SummitFertiliser Prices Sit 71 Percent Above Their 2024 Average LevelState Aid Exemptions Face a Rewrite With Four Months to SpareIrregular Crossings Fell 37 Percent and Spain Is the Exception
August 29, 2026

Newsletter

The European Post

Policy • Diplomacy • strategic insight

LATEST
What Europe Needs From the GCC Summit Riyadh Will Host in AutumnHolding Limits Still Block a Digital Euro Deal Before DecemberData Rules Agreed With Seoul Now Wait on Parliament’s ConsentChina Listed Fourteen European Firms and November Ends the TruceWhy Australia’s Finished Trade Deal Still Has No Signature DateLate Application Leaves Tokyo Outside the Defence Loan QueueCyber Resilience Rules Give Makers 24 Hours From SeptemberWinter Stocks Test Europe’s New Gas Storage Flexibility RulesInnovation Theory Meets Merger Control in a New Commission StudyMercosur Tariffs Fell in May and the Court Has Not Ruled YetBilaterals III Now Turns on Which Referendum Switzerland PicksDark Patterns Face the EU Digital Fairness ActFifteen Chapters Stand Between Montenegro and 2028Who Blinks First in the FP10 Research Budget FightCustoms Reform Landed in March and Its Data Hub Opens in 2028Victims Rights Gain an EU Helpline and Capitals Have Two YearsIreland Must Move the EU Budget Box Before the October SummitFertiliser Prices Sit 71 Percent Above Their 2024 Average LevelState Aid Exemptions Face a Rewrite With Four Months to SpareIrregular Crossings Fell 37 Percent and Spain Is the ExceptionWhat Europe Needs From the GCC Summit Riyadh Will Host in AutumnHolding Limits Still Block a Digital Euro Deal Before DecemberData Rules Agreed With Seoul Now Wait on Parliament’s ConsentChina Listed Fourteen European Firms and November Ends the TruceWhy Australia’s Finished Trade Deal Still Has No Signature DateLate Application Leaves Tokyo Outside the Defence Loan QueueCyber Resilience Rules Give Makers 24 Hours From SeptemberWinter Stocks Test Europe’s New Gas Storage Flexibility RulesInnovation Theory Meets Merger Control in a New Commission StudyMercosur Tariffs Fell in May and the Court Has Not Ruled YetBilaterals III Now Turns on Which Referendum Switzerland PicksDark Patterns Face the EU Digital Fairness ActFifteen Chapters Stand Between Montenegro and 2028Who Blinks First in the FP10 Research Budget FightCustoms Reform Landed in March and Its Data Hub Opens in 2028Victims Rights Gain an EU Helpline and Capitals Have Two YearsIreland Must Move the EU Budget Box Before the October SummitFertiliser Prices Sit 71 Percent Above Their 2024 Average LevelState Aid Exemptions Face a Rewrite With Four Months to SpareIrregular Crossings Fell 37 Percent and Spain Is the Exception

Online Marketplaces Face a Study That Could Reshape Their Design

Viktoria Ottesen
Policy Watch Reporter, EU Budget

Poznań: A procurement notice is an unlikely place to look for regulatory intent, but the one published on 17 August is worth reading. The Commission has tendered a study on how the design of online marketplaces shapes user behaviour, focusing on how people actually interact with the features that the Digital Services Act requires of very large online marketplaces.

The framing is the point. The DSA already obliges designated platforms to display trader information, run notice-and-action systems and give researchers data access. What the tender asks is a different question: whether those obligations change anything once a user meets them inside a real interface, surrounded by ranking, urgency cues and default settings that the platform controls. Regulators have spent three years writing rules about what must be shown. This study asks what gets seen.

That distinction has already produced enforcement. The Commission fined X 120 million euros over deceptive design around verification badges, researcher data access and its advertising repository. It reached preliminary findings that TikTok’s design was addictive within the meaning of the Act, opened proceedings against Shein over addictive design, transparency and the sale of illegal products, and issued findings against several adult-content platforms on protection of minors. In March it opened a formal investigation into Snapchat. The common thread is not content moderation but interface architecture.

Design-based enforcement is harder than it looks. A takedown order concerns a specific item and can be verified. An order to stop using a manipulative pattern requires the regulator to define the pattern, prove that it steers users, and then judge whether the redesign fixed it. Commissioning behavioural research before the next wave of cases is what a regulator does when it expects to defend its reasoning in court.

Marketplaces present the sharpest version of the problem because the harm is commercial rather than expressive. If a listing for an unsafe toy sits three positions above a compliant one, no speech interest is engaged and the injury is concrete. That makes marketplaces the cleanest test bed for the argument that ranking and layout are regulated conduct, and it explains why the Commission is building an evidence base here rather than on a social feed.

Platforms will argue, not unreasonably, that every interface steers someone and that a rule against steering collapses into a rule against design. Where a court draws the line between persuasion and manipulation is genuinely unsettled, and the DSA’s dark-pattern provisions are drafted broadly enough to invite that fight.

Penalties reach 6 percent of global annual turnover, and the Commission can require corrective measures on top. A study that opened as a routine tender in August will end up as an annex in whichever case comes next.

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