Earlier quoted context omitted.
I think Google might have better ways to track people. Fonts are also cached by CDNs and the local browser so I’m not sure if they provide good tracking data (they get loaded only for the first page visit for example and popular fonts like Open Sans are probably already in your cache when you open a page). If you’re concerned about tracking as a website operator you can simply load the fonts from your own server, mos…
You can even install the fonts locally to your machine and your browser will favor the local copy. There are some tools like Skyfonts that let you install the top X from Google Fonts and it can be a fun way to speed up a lot of the web; with the tradeoff that not a lot of people have the top X installed for useful large versions of X and that becomes its own fingerprint for surveillance software (testing how long tex…
Note that some browsers are going in the opposite direction and actively hiding installed fonts from websites due to the potential for fingerprinting.