Kotaku looked at 25,000 location records shared with it by 10 players of Niantic games. It found that Niantic kept about three location records per minute of Wizards Unite gameplay. That was nearly twice as many records as it kept for Pokémon Go. In one case, Niantic had at least one location record taken nearly every hour of the day. In other words, it likely swept up location data even when the user was not playing.
In its report, Kotaku warns that Niantic has enough location data to "discern individual patterns of user behavior as well as intimate details about a player's life." That may be true, but it's nothing new or specific to Niantic. Google has enough location data to help investigators solve crimes -- though it now lets you auto-delete your history. And bugs that leak your location data are not unheard of, just ask Twitter.