France’s antitrust regulator fined Apple Inc. €150 million ($162 million) after a lengthy probe into how the technology company asks to collect iOS users’ data and the impact on advertisers.
Apple’s ATT system is not allowing app publishers to comply with Europe’s GDPR privacy rules, the authority said, forcing these apps to display multiple pop-ups and making their use excessively complex.
Here’s the press release by the anti-trust agency: https://www.autoritedelaconcurrence.fr/en/press-release/targeted-advertising-autorite-de-la-concurrence-imposes-fine-eu150000000-apple
TLDR: Apple made it too complicated for third-party publishers to track users.