Guess it's because Yandex gets most of its ad revenue from searches in Russian. Search results for English queries are not so ad-cluttered. For searches in Russ

Guess it's because Yandex gets most of its ad revenue from searches in Russian. Search results for English queries are not so ad-cluttered. For searches in Russian language, Google is still better (shows less ads per page), but tends to prefer .ua websites. I guess their ML predicts European IP + Russian language as a proxy for someone from Ukraine now, which is pretty logical.