Did I miss something, I thought Facebook sold advertising based on cohorts? That's surely just as discriminating? I seem to remember age ranges being part of th

Did I miss something, I thought Facebook sold advertising based on cohorts? That's surely just as discriminating? I seem to remember age ranges being part of that as well, but even without that specificity a cohort will naturally select for cultural groupings, which will include delineations like age, race, social standing etc.