https://news7g.com/estimate-apples-ios-app-tracking-transparency-policy-cost-snap-facebook-twitter-and-youtube-almost-10b-in-combined-lost-ad-revenues-so-far-patrick-mcgee-financial-times/
Estimate: Apple's iOS App Tracking Transparency policy cost Snap, Facebook, Twitter, and YouTube almost $10B in combined lost ad revenues so far (Patrick McGee/Financial Times)