Earlier quoted context omitted.
One possibility "Russian pride". That might be wrong guess but there lot of things Russian simply to have something "Made in Russia" (e.g. yandex search itself).
Yandex search launched in 1997, a year before Google. It was the only search engine that could understand Russian morphology.
That's OK. There were many engines before Google that were forgotten. It is completely possible that Yandex search for average Russian is better than Google but my impression is that it is not (my impression might be wrong). I know that there are some services that Yandex does better than Google in Russia.