Reddit is amongst the social media subpoenaed for records relating to the Capitol’s (and American’s democracy) terrorist attack of 6 January 2021. The press release mention Reddit as:

[…] the platform for the “r/The_Donald” ‘subreddit’ community that grew significantly on Reddit before migrating to the website TheDonald.win in 2020, which ultimately hosted significant discussion and planning related to the January 6th attack.