Fort Lauderdale beach spring break visitors' movements visualized on the map

Uhm, okay, so they can track secondary locations of people that have been on a particular stretch of beach in granularity of what looks like at least a day? How did the term "anonymized" slip into that sentence?

https://xmode.io/privacy/ says it's using fine grained location data in the same sentence as referring to it as "aggregated at the advertising ID level and associated to the device and not a physical person" which I just nominated for "most misleading BS I'll read all day".

finally someone actually speaking about anonymization

https://covid-watch.org/article#heatmapTitle