Nefarious actions by others shouldn't justify your own. We can do better.

It's a matter of scale. Objectively, yandex is a great resource, and Kagi's results would be degraded without it. Pennies per user go to them. The sum of the entire money that has ever transferred from Kagi to yandex is what? 30 seconds of EU oil and gas purchases?

In short: pick smart battles.