The lesson of this story (of a Catholic blog using commercially resold Grindr data to out a gay priest) is *either* that anonymised data can always be de-anonymised (pretty much the intuition of lots of experts I know), or, less generally, you can't expect an org that benefits from selling other people's data to calibrate how much they should spend on anonymising.
https://twitter.com/josephfcox/status/1417880159462567940

Remembering when I was about 14 I wanted to open a cafe for programmers called the Most Significant Bite