Earlier quoted context omitted.
You can't use FLoC ID for fingerprinting, it changes continuously.
Interesting, didn't know that. In that case then how does it identify a cohort in a useful manner? Surely websites will need to temporally tie together the values to be able to target ads?
Cohort membership changes pretty frequently instead. So the system may put all people that browse mostly golf sites together in cohort 12345 that only the algorithm knows it's about golf sites, people enter and leave that cohort on a daily basis and you can only be a member of a single cohort at a time.