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by pgeorgi 3485 days ago
Regarding fonts, see https://developers.google.com/fonts/faq#what_does_using_the_...

While some data is stored, no cookies are sent, plus there's heavy caching involved: "The result is that website visitors send very few requests to Google: We only see 1 CSS request per font family, per day, per browser."

All in all, those services (IIRC the JS library CDN is similar) don't seem to be designed to be a tracking data source except for some popularity stats about the data hosted there.