X and the World Federation of Advertisers have settled litigation arising from the social media platform’s allegation that major brands coordinated the withdrawal of advertising through a shared brand safety initiative.
The agreement closes the dispute over the Global Alliance for Responsible Media, known as GARM, which was established by the advertising industry in 2019 to develop common approaches to harmful and illegal online content.
X had argued that activity associated with the initiative contributed to advertisers withholding expenditure from the platform. A US judge dismissed the company’s antitrust case in March after finding that it had not adequately demonstrated the claimed competitive harm.
The World Federation of Advertisers has confirmed that GARM, which was discontinued in August 2024, will not be revived and that it has no plan to establish a replacement with a similar structure.
Although the legal conflict has ended, advertisers still face unresolved questions over how common brand safety standards should operate across global digital platforms. Individual companies remain responsible for deciding where their advertising appears, but the classifications, measurement systems, and technical controls used to make those decisions often depend on shared definitions.
GARM attempted to reduce inconsistency by developing categories for harmful material and common measurement principles. The federation reported that the proportion of advertising appearing alongside harmful or illegal content across monitored environments fell from 6.1% in 2020 to 1.7% in 2023.
Its closure has left brands, agencies, verification companies, and platforms to develop more separate approaches. Individual systems can accommodate different levels of risk, yet they also create duplicated audits, incompatible thresholds, and uneven enforcement across channels.
The dispute exposed a tension between collective industry standards and competition law. Common definitions can improve transparency and reduce operational complexity, but coordination between large advertisers can attract scrutiny where it appears to influence shared spending decisions or access to revenue.
Platforms have a commercial interest in demonstrating that their environments are suitable for advertisers. Brands, meanwhile, need to avoid appearing alongside violent, illegal, discriminatory, or otherwise damaging material. Those interests overlap, but they do not always produce agreement over who should define acceptable risk or verify performance.
Without GARM, more responsibility is likely to fall on bilateral negotiations between platforms, agencies, and major advertisers. Smaller companies have less purchasing leverage and fewer internal resources to assess digital environments, increasing their reliance on automated controls and external technology providers.
The debate also extends beyond individual campaigns. New restrictions on social media use and youth marketing are increasing the legal and operational responsibilities attached to platform advertising, particularly where age assurance and content moderation intersect.
Statutory platform duties do not remove the need for brand specific controls. Content can remain legally permissible while still conflicting with a company’s values, customer expectations, or sector responsibilities.
Marketing and procurement teams therefore have to distinguish between legal compliance, platform policy, and individual brand suitability. A placement may satisfy the first two requirements while still creating reputational exposure because of the surrounding material, creator behaviour, or the way an automated advertisement is interpreted.
The financial dependence of advertising supported platforms on a comparatively concentrated group of large buyers adds another dimension. Sudden reductions in expenditure can materially affect revenue, influencing staffing, product investment, content moderation, and wider platform strategy.
Advertisers also need evidence that their controls work in practice. Written policies, documented escalation procedures, independent verification, and regular reviews of placement data offer stronger protection than broad exclusion lists or platform assurances alone.
Technical controls are becoming more demanding as campaigns spread across video, creator content, automated inventory, retail media, and artificial intelligence generated material. Classification systems must operate at speed and scale without preventing access to legitimate audiences or excluding large quantities of suitable content.
Agencies may respond by investing more heavily in proprietary standards and verification partnerships. That could provide clients with greater control, although it may also deepen differences between large advertisers with sophisticated systems and smaller buyers relying on standard platform tools.
The settlement ends the courtroom contest without restoring the former industry structure. The next phase will depend on whether advertisers and platforms can develop credible common tools while avoiding the collective spending concerns that contributed to the dispute.
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