In a deep dive report, The Wall Street Journal looks at how changes to Apple's application tracking rules have affected advertising sales for Facebook. In early February, Facebook parent company Meta said it expected approximately a $10 billion hit to ad sales this year because of the change. Last week, Google announced an update to apps on Android devices that could curtail tracking of users. "Facebook has known for some time that they operated at the whim of the platforms on which consumers access their app," advertising technology executive Ari Paparo said. "And now those platforms are changing the rules, and there's little they can do about it."