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Google: "we won't use alternate identifiers in our products" Also Google: "Your data must be keyed to an identifier that Ads Data Hub tracks" cf. blog.google/products/ads-commerce/a-more-privacy-first-web/ & developers.google.com/ads-data-hub/guides/join-your-data 🤔 1/
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Quoting @robinberjon: "These lists are oddly ad hoc. Instead of listing data sources that are excluded for specific purposes, at the very real risk of omitting an important source of distortion as Google competes with publishers in the ad market" berjon.com/google-cma/ 3/