According to some people on the fediverse, the Kagi forum thread that is linked in the toots I posted above and seemingly nowhere else.
From a non political standpoint: I tried Kagi last year and it was ok but I didn't get the big deal. And because I'm not in the US but the UK if you try searching where's my nearest garage or stay the nearest result came up as 150 miles away. So it's one of those things I'll maybe return to it once it's developed a bit more