Google most probably has a much larger reserve of everyone’s dirty laundry. Like a record of every website you've gone to that uses JS served fast and free fro

Google most probably has a much larger reserve of everyone’s dirty laundry. Like a record of every website you've gone to that uses JS served fast and free from Google, fonts served fast and free from Google, on-site search by Google (complete with a logo most likely served direct from Google), etc. And that ignores the most obvious: Google Analytics, where in addition to telling webmasters # of distinct visitors to the site, for each of those visitors they can track "Visited site X" for their own internal use.