EU advertising libraries mandate archiving, reach data, and transparency under the DSA, enabling fraud and influence detection even after ads stop running. In contrast, most US online ads disappear without trace, making large-scale manipulation effectively invisible.

Ad fraud thrives where ad systems lack transparency, allowing platforms to profit while users and businesses bear the harm.

A new report says bot networks are hijacking TikTok in Germany to boost far-right AfD content, distorting public opinion with fake engagement and extremist hate speech.