Kiwi Farms, 8chan and a third online message board called Voat are all under investigation by authorities tracking Tarrant’s online activities. They are popular with incels (involuntary celibates), an online subculture of men who claim they are unable to find sexual or romantic partners.
https://www.news.com.au/technology/online/website-kiwi-farms-refuses-to-surrender-data-linked-to-accused-christchurch-terrorist-brendan-tarrant/news-story/46d3c925ef84b24dde6194c42b3c2241