There is a moment — somewhere between the boardroom and the newsfeed — when a brand must decide what it stands for. Not in a manifesto or a mission statement, but in the most material way possible: where it places its money.

In the spring of 2026, that question has never been more urgent. Juries in New Mexico and Los Angeles have found Meta liable for causing measurable harm to children. X — the platform formerly known as Twitter — has watched its advertising revenue collapse by over a quarter in a single year. And the industry body that once gave advertisers collective cover to demand better from platforms no longer exists, having been legally destroyed by the very platform it sought to hold accountable. The question is no longer theoretical: what role should brands play in holding tech platforms to account?

The numbers tell two very different stories about advertiser power. On one platform, the withdrawal of brands has been swift, visible, and financially consequential. On another, spending has grown faster than ever — even as courts deliver landmark verdicts against it. The contrast reveals a central tension that the global advertising industry has yet to resolve: brands possess enormous leverage, but wielding it requires collective will, legal confidence, and a stomach for consequence.

The rise and fall of collective action

For a brief period between 2019 and 2024, the industry had a mechanism. The Global Alliance for Responsible Media — GARM — was born in the wake of the 2019 Christchurch mosque shootings, during which footage of the attack was amplified unchecked across social platforms. Established by the World Federation of Advertisers, GARM brought together some of the world’s most powerful brand owners — Unilever, Mars, CVS Health, alongside agency networks and platform giants — to agree common standards for brand safety and to pressure platforms into removing harmful content from ad-supported environments.

It was an imperfect institution. Critics from the left accused it of being too slow; critics from the right accused it of being censorious. But it was the only cross-industry forum where advertisers and platforms were compelled to sit in the same room and reach negotiated agreements on what constituted harmful content. And then, in August 2024, Elon Musk’s X sued it out of existence.

The irony is that GARM’s collapse happened precisely as the brand safety crisis it was designed to address was deepening. The same month it was shuttered, research by Adalytics found hundreds of ads appearing next to explicitly racist and sexual content on X — despite those ads being served through industry-certified brand safety controls. Certification, it turned out, was not the same as safety.

The X experiment — when boycotts work

X has become the most studied case in the modern history of advertiser accountability. Since Elon Musk’s acquisition of the platform in 2022, and the rapid dismantling of its content moderation infrastructure, global brands have progressively withdrawn their advertising investment. The result has been financially significant. The platform recorded a 24% year-on-year decline in advertiser support in the first half of 2024 alone. A net 14% of marketers planned to reduce their X investment that year, while rivals like TikTok saw a net 77% of marketers planning to increase spend.

The industry has been careful not to call it a boycott. “The marketing community views this shift not as a ‘boycott,’ as X might perceive it,” noted one analysis at the time, “but rather as the exercise of freedom of choice.” That semantic distinction matters enormously — it is, in fact, the legal fig leaf that allowed brands to act collectively without triggering the antitrust vulnerabilities that ultimately destroyed GARM.

The children question — a new frontier of responsibility

If X represents what happens when brands act, the Meta situation represents the cost of inaction. In March 2026, a jury in New Mexico ordered Meta to pay $375 million after finding the company had misled users about how safe its platforms were for children — exposing them to sexually explicit material and contact with sexual predators. Days later, a Los Angeles jury found both Meta and YouTube liable for causing harm to children, marking the first time two juries had reached such verdicts in back-to-back trials.

The legal theory at the heart of both cases was borrowed from the tobacco industry’s long reckoning: rather than attacking content, plaintiffs focused on platform design — the addictive features that kept children scrolling. “The same dopamine reaction,” one plaintiff’s attorney noted, drawing the comparison directly.

For brands, this creates a new and uncomfortable calculus. Every advertising pound or dollar placed on a platform found liable for child harm is, at minimum, a reputational adjacency risk. At most, it is a question of complicity. Industry analysts noted in early 2026 that brands advertising on platforms facing youth-safety litigation “could encounter spillover reputational risk” — and that context and ad adjacency monitoring would become more important than ever.

Some brands have begun to act on this logic. Mumsnet, in partnership with creative agency Adam&Eve, launched a campaign in 2025 comparing social media addiction to cigarettes — invoking the same cultural and legal framework that eventually forced tobacco into regulated submission. The campaign represents a new kind of brand-led accountability: not a spending decision, but a public advocacy position.

The power paradox — and why brands hesitate

The numbers suggest brands hold more leverage than they use. UK digital advertising spend surpassed £40 billion in 2025, growing 10% year-on-year. Platforms — those closed digital ecosystems where a single provider controls content, data and user interaction — claimed 68% of that total. Social media spend alone hit £11.5 billion, growing 21% in a single year. Yet despite these concerns, the industry has seen no repeat of the widespread, coordinated advertiser boycotts of 2017.

Why? Because the commercial reality is that audiences are concentrated on these platforms, and advertising investment follows audiences. As one senior industry observer put it, “the misperception of government is that big brand advertisers have a huge amount of muscle.” They do — but they also have quarterly targets, shareholder expectations, and a dependence on the very platforms they might wish to discipline.

Brian Jacobs, co-founder of the Advertising: Who Cares movement, believes the industry’s appetite for public confrontation has diminished. “It used to be the case that we spoke out,” he says. The combination of antitrust risk — crystallised by the GARM lawsuit — and commercial dependency has produced a more cautious, more private form of pressure. Brands, when they act, increasingly do so quietly.

A new accountability architecture

So what should brands actually do? The evidence from five years of brand safety debates suggests four distinct levers — none of which is sufficient alone, but which together represent a coherent accountability architecture.

The first is the spending decision. As the X case demonstrates, the withdrawal of advertising dollars at scale changes platform behaviour and financial performance. Brands should treat their media investment as a values statement, not merely a targeting mechanism. Where a platform’s governance, content environment or design ethics are inconsistent with a brand’s stated values, the money should move — and it should move visibly.

The second is transparency demand. Brands have the contractual power to require platforms to provide granular data about where their ads appear, what content they fund, and how algorithmic recommendation systems work. Most do not use this power. A generation of brand-side data and procurement teams empowered to interrogate platform reporting would create accountability pressure that no regulator has yet achieved.

The third is coalition rebuilding. GARM’s collapse left a vacuum, but the appetite for collective standards has not disappeared. The challenge is to rebuild it in a form resilient to legal attack — one that focuses on individual brand decision-making frameworks rather than collective action, and that makes clear, at every step, that advertisers are exercising their independent commercial judgement rather than coordinating against a specific platform.

The fourth — and perhaps most powerful — is public advocacy. The Mumsnet campaign is instructive. A brand or industry coalition that publicly frames platform harm in the language of public health, child safety, or democratic integrity has the potential to shift the political and cultural context in which platforms operate. Regulation follows public sentiment. Brands that shape that sentiment hold more power than they know.

Where does this leave global brands?

The dominant platforms are not going to reform themselves out of commercial interest — their incentive structures are too deeply aligned with engagement, and engagement is, by design, indifferent to harm. Governments are moving, but slowly, and their reach is inherently jurisdictional in a borderless digital world. The courts, as 2026’s landmark verdicts suggest, are beginning to find their courage — but litigation is retrospective, expensive, and uncertain.

That leaves brands. Not as the last line of defence, but as the most structurally powerful actors in the accountability ecosystem who are not currently using their power proportionately to the stakes. In a world where 51% of consumers have stopped shopping from brands that do not align with their values, the commercial logic for action is converging with the ethical one.

The real question is not whether brands have the power to hold tech platforms accountable. They demonstrably do. The question is whether the advertising industry can develop the collective courage, legal architecture, and strategic clarity to use it — before the platforms, the algorithms, and the harm they enable grow beyond anyone’s reach to constrain.

The money is already in the room. It just needs to speak.