I sat in a meeting at a data broker in 1998 where one of their product managers was strangely proud about how they could determine menstrual cycles from purchas

I sat in a meeting at a data broker in 1998 where one of their product managers was strangely proud about how they could determine menstrual cycles from purchase records. It wasn't just hygiene products either. They already have that data and manipulate women with targeted ads timed for the optimal receptivity.