It's true, Chrome puts your privacy in that sandbox.
Yes, and...
Then ships it to the curious:
The Topics API from Chrome is here, which will share a list of user interests with advertisers when they ask, so advertisers can show relevant ads. The new Android FLEDGE API tracks users' behavior inside an app and throws them into groups for "custom audience targeting."
Doing privacy-respecting ads is not hard, generate the relevant cohorts on the client, pull either all ads, or k-anonymity if the pool of ads and expected size of cohort are large, and then use that pool of ads.
But that means they don't get "useful" ad metrics in any form, so its a non-starter for the IAB.
Yes, and...
Then ships it to the curious:
The Topics API from Chrome is here, which will share a list of user interests with advertisers when they ask, so advertisers can show relevant ads. The new Android FLEDGE API tracks users' behavior inside an app and throws them into groups for "custom audience targeting."