X (formerly Twitter) has deactivated the European Commission's advertising account following the regulatory body's imposition of a €120 million fine on the platform. This action comes just one day after the European Commission penalized X for violations related to its verification system, advertising transparency, and data provision for researchers. The platform's head of product, Nikita Bier, accused the European Commission of exploiting a vulnerability in X's Ad Composer system to artificially boost the reach of their post announcing the fine. According to Bier, the commission logged into their dormant ad account to take advantage of this exploit, posting a link that misled users into thinking it was a video. While X stated that the exploit has now been patched, the platform proceeded to revoke the European Commission's ability to purchase and track advertisements. This termination occurs despite X still needing to submit specific measures and an action plan to address the concerns that led to the fine, which was the first-ever penalty under the Digital Services Act. The escalating tensions between X and European regulators highlight ongoing challenges in content moderation and platform accountability.

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