Hackers tend to have their own culture, their own blogs and so on. So you're unlikely to just find someone recommending Kagi on social networks the same way some HNers do. Maybe on Reddit (though not nearly as much as before). Generally, social networks for hackers don't turn out well, there are exceptions but you're usually more likely to find them using regular tools (like IRC) as a social network rather than being anywhere actually designed to act like a social network. You might see recommendations like this more often if you frequent IRC spaces or etc. where lots of hackers hang out; they share their tools a lot, including search engines.
villgax · · focus · HN ↗
LoganDark · · focus · HN ↗