Some related past threads:

Public Suffix List Problems - https://news.ycombinator.com/item?id=20889474 - Sept 2019 (15 comments)

The Public Suffix List - https://news.ycombinator.com/item?id=12311530 - Aug 2016 (40 comments)

Public suffix list - https://news.ycombinator.com/item?id=9634824 - May 2015 (1 comment)

Public Suffix List - https://news.ycombinator.com/item?id=850115 - Sept 2009 (3 comments)