Yeah but just thinking about how this would work. For sites like DuckDuckGo, Ecosia, or Yahoo search, they don't have hundreds of engineers maintaining their ow

Yeah but just thinking about how this would work. For sites like DuckDuckGo, Ecosia, or Yahoo search, they don't have hundreds of engineers maintaining their own search engines, they must just call some Bing API. The Bing API must return the search results already ranked. (Otherwise what would be the alternative?) So the down-ranking of russian sites would happen upstream of DuckDuckGo.