Wouldn't an HN account need to be mentioned, once this platform is made visible enough, so that the bozos in charge, in the US, take it seriously? A social media ICE would love to dig into such.
Why not? Anything where user interaction is a primary portion of the site's content is social media. The term "social media" predates algorithmically-driven parasocial feeds, though it does postdate things like BBSes and PHPBB.