I'm not sure what the exact solutions are, I just know there is a problem of cultural dominance. Perhaps a slightly increased standard for international relevance wouldn't be entirely unreasonable? There are sometimes intranational political developments of interest to the rest of the world, but if we're just letting popular vote decide what subscribers see without moderation, then based on initial observation, non-USians will just have to move to more regionally specific communities/instances or consent to cultural assimilation.