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Linda Yaccarino resigns as CEO of X amid AI controversies and advertiser backlash

In a surprise move, Linda Yaccarino announced her resignation as CEO of X, the social media platform formerly known as Twitter, just months after the company was absorbed by Elon Musk’s AI startup, xAI. Yaccarino shared the news via a post on X, stating, “I’ve decided to step down as CEO of X,” though no specific reason was provided for her exit.

The abrupt departure deepens the turmoil surrounding Musk’s tech empire, which includes Tesla, SpaceX, and xAI. Musk responded briefly, writing, “Thank you for your contributions,” in a reply to her resignation post. No successor has been named.

Turmoil at the top

Yaccarino, 61, was appointed in 2023 after a high-profile career at NBCUniversal, where she was chair of global advertising and partnerships. Her mission at X was to repair the platform’s relationship with advertisers, many of whom had pulled back due to a surge in extremist and toxic content under Musk’s leadership.

Her resignation follows closely on the heels of a Grok-related controversy, in which xAI’s chatbot posted content containing antisemitic tropes and praise for Adolf Hitler. The posts, which were removed after a wave of criticism, may have heightened internal tensions. Analysts suggest the Grok incident could have been a breaking point, with some citing a clash of leadership styles between Yaccarino and Musk.

“This may have come to a head when the embedded AI chat Grok started responding to AI posts in an increasingly offensive manner,” said Gil Luria, analyst at D.A. Davidson.

Struggles with advertiser trust

While at X, Yaccarino worked to rebuild advertiser confidence, even launching lawsuits against certain advertisers and industry bodies like the World Federation of Advertisers, alleging collusion and boycotts aimed at hurting the platform’s revenue.

Despite the headwinds, some analysts argue that Yaccarino achieved what she was brought in to do. “She accomplished what she was hired to do,” said Jasmine Enberg of Emarketer, pointing to projected ad growth in 2025.

Still, her efforts were under constant strain due to Musk’s provocative statements and unpredictable governance. Yaccarino often found herself putting out fires, navigating PR crises and internal upheaval while attempting to launch new business features, such as:

  • Partnerships with Visa to develop direct payments,

  • A smart TV app for X content,

  • Preliminary discussions around X-branded debit or credit cards, as reported by the Financial Times.

Wider Musk empire faces instability

Yaccarino’s resignation is the latest in a string of executive departures linked to Musk. At Tesla, the CEO’s longtime associate Omead Afshar and North America HR director Jenna Ferrua left last month. Tesla shares dipped 1% following the Yaccarino news.

Musk, who briefly held a government post earlier this year under the Trump administration, is now juggling several companies while facing mounting scrutiny over content moderation, AI safety, and business ethics.

X is also burdened by heavy debt and remains under pressure from both advertisers and regulators over its content policies and AI integrations.

FTC Probes Media Matters Over Alleged Role in X Advertiser Boycott

The U.S. Federal Trade Commission (FTC) has opened an investigation into Media Matters, demanding documents about potential coordination with other watchdog groups accused by Elon Musk of organizing advertiser boycotts targeting X, the social media platform formerly known as Twitter.

According to a document reviewed by Reuters, the FTC issued a civil investigative demand (CID) requesting details about Media Matters’ communications with groups like the Global Alliance for Responsible Media (GARM)—a now-disbanded initiative under the World Federation of Advertisers. Both organizations are also being sued by Musk’s company for allegedly coordinating an illegal boycott of X.

The investigation is focused on whether Media Matters and other entities colluded to pressure advertisers into pulling ad spending from X, which Musk acquired in 2022.

Escalation Under Trump-Era FTC Chair

The probe reflects a shift in priorities under FTC Chairman Andrew Ferguson, appointed by President Donald Trump. In December, Ferguson stated:

“We must prosecute any unlawful collusion between online platforms, and confront advertiser boycotts which threaten competition among those platforms.”

The FTC has not made any formal accusations, and a CID is not an indication of wrongdoing. However, the demand signals that federal regulators are scrutinizing possible anticompetitive conduct in the ad industry amid rising political and legal tensions between progressive media groups and Musk-led platforms.

Media Matters Responds

Angelo Carusone, President of Media Matters, condemned the probe:

“The Trump administration has been defined by naming right-wing media figures to key posts and abusing the power of the federal government to bully political opponents and silence critics.”

“These threats won’t work; we remain steadfast to our mission.”

Media Matters is engaged in two legal battles with X—defending itself from a 2023 defamation lawsuit and pursuing its own case accusing X of retaliatory litigation tactics.

Background and Broader Legal Context

  • X sued Media Matters in 2023 for publishing reports that showed major brand ads appearing next to extremist content on the platform.

  • Media Matters countersued, alleging that Musk’s company was trying to silence critical reporting with costly, meritless lawsuits.

  • X also sued the World Federation of Advertisers and major brands in Texas federal court, alleging unlawful conspiracy to limit advertising.

  • The U.S. House Judiciary Committee, chaired by Rep. Jim Jordan, has previously accused GARM of coordinating an illegal group boycott. The initiative was shut down in August 2023.

Market Context

While X has struggled with declining ad revenue since Musk’s takeover, research by Emarketer suggests ad spending could increase in 2025, although it still remains below pre-acquisition levels.

Elon Musk, a major Trump campaign donor, has been publicly vocal about alleged efforts to suppress conservative voices and crypto innovation, while also pushing a broader federal workforce reduction initiative.

Elon Musk’s X Sues Ad Industry Group Over Alleged Advertising ‘Boycott’

Elon Musk’s X has filed a lawsuit against the Global Alliance for Responsible Media (GARM) and four prominent companies — CVS, Unilever, Mars, and Ørsted — alleging antitrust violations and accusing the group of orchestrating an advertising “boycott” against the platform. The lawsuit claims that GARM, an ad-industry initiative run by the World Federation of Advertisers, conspired to collectively withhold billions of dollars in advertising from Twitter, now rebranded as X, due to concerns over brand safety standards post-Musk’s acquisition in late 2022.

GARM aims to help brands avoid placing advertisements alongside illegal or harmful content. It comprises over 100 member companies who agree to adhere to GARM’s brand safety standards. The lawsuit alleges that after GARM publicly urged X to comply with these standards, many affiliated companies abruptly reduced or halted their advertising on the platform. This action, according to X, has significantly harmed its core ad business, which has struggled since Musk’s takeover due to fears of ads running alongside misinformation or hate speech.

X’s CEO, Linda Yaccarino, highlighted the dire situation in a video, stating that the alleged boycott threatens the company’s long-term viability. The lawsuit seeks to prevent GARM from continuing to make recommendations about advertising on X and requests unspecified monetary damages.

This lawsuit is part of a broader pattern of legal actions by X to address its declining ad revenue. Previously, X sued the Center for Countering Digital Hate (CCDH) and Media Matters, both watchdog groups, accusing them of distorting information about hate speech and extremist content on the platform, which they claim drove advertisers away. A federal judge dismissed the suit against CCDH, and the case against Media Matters is set for trial next year.