what happened to stalin getting karma
Wealth and power can circumvent most social issues, and things like media and charisma can spin the appearance of one's karma. People'd still potentially get a read on them if they met them (if they aren't distracted by the above), but what could the average person even do about it? What would some poor farmer seeing Stalin as a terrible guy is even accomplish? It'd only mean something if his power and wealth were ripped from him, maybe.
Karma is a human force, and anything human can be worked around. It is a thing that can be both flexed and twisted, because it isn't mystical, but instead based around familiarity appearances within demographic labels through stuff like aesthetic, tendencies, and body language. This is why a Con Artist can fake his karma, although even that tends to leave signs people familiar with the tendencies may notice.