I think it’s valid to boycott Russian companies, or any companies that supports them. Justifying it to be the best search engine doesn’t necessarily make it right. And yet I still have a paid Kagi subscription, but I don’t blame people who don’t, and think their use of Yandex should be more obvious.

Agreed. I pay for Kagi, and find their search better than any other, and struggle when I’m forced to use another search engine temporarily.