nostr:npub19fywau9ff6pjmjek7k4kukgdcdf7w4chne57upj5s7y87gk7v27qx7n5nv those counts are accumulated for a week and then categories the user has shown most interest in (the onea with the biggest counts) are collected and saved.  All other counts are saved.  If you went to a "shoe store" site one time, it will not make it into your topics list.