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Their "ads" are driven from more sectors than Facebook. Whatsapp has no ads, so it's basically FB and Insta

FB has Audience Network which extends their targeting off platform.

But yes, Google’s acquisition of Doubleclick and investment in video through YouTube has allowed them to capture the publisher and buyer side of much of the open web (and use the data to cut out competition - cf. Project Bernanke)

Audience network just took a big hit from apples privacy policy changes. Google controls the entire ecosystem for many users and most of the ecosystem for pretty much all of them, so they can never get blindsided like Facebook did.

I saw this claim elsewhere in this thread as well, but I didn't really get it. Google is going be affected equally by iOS changes. Google does control the Android/Chrome ecosystem, but I don't see how Google could make any changes there that hurt Facebook because of antitrust concerns.

Facebook says the iOS changes are going to cost them $10 billion this year. Google blew past earnings and issued strong guidance last quarter.

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