Nobody was ever in doubt that Apple's new anti-app tracking (ATT) feature, rolled-out with iOS 14.5 would have a major impact on the way targeted advertisement works and consequently, any company with a business model built around it. Like Facebook and its subsidiaries, like Instagram - some of the most severely-affected parties and naturally among the most vocal against ATT. Having a hunch that a certain change is significant, though, is not the same as getting some actual data on just how significant it is. The Verizon Media-owned Flurry Analytics has its mobile analytics services...
Source: https://www.gsmarena.com/just_12_of_global_ios_users_and_4_of_us_ones_have_allowed_app_tracking_since_the_ios_145_rollout-news-49014.php
