Keywords are not part of an ad. Keywords are just one of the required conditions for an ad to be displayed. The law does not prescribe any special requirements, limits or restrictions on the use of keywords. This also applies to keywords that fully or partly match any trademark. In addition, Russia's competition law encourages competition and the freedom of economic activity. Yandex does not have the right to decide on the legality or illegality of an advertiser's actions in this situation. Therefore, Yandex does not take part in such disputes. Please, contact the advertiser directly on such matters.