Not defending Yandex here, but I think their military involvement might be as accidental as of an American farmer whose beef landed in the cantina of aircraft carrier. Government and military procurement in Russia is its own universe, with strong players having specific IT expertise and capable of building DCs and tech. Assuming that everywhere in the world it’s the same as in America is wrong. Consumer tech companies aren’t operating this way usually, it is the scale of American Big Tech that allows them to compete with traditional contractors.