bugmen are retarded enough to get membership just to spam Coco's chat. If Coco collabed with, for example, Kiara, chinks would harass her for weeks after the collab.
Don't get me wrong, I do think HoloJP and HoloEN should collab WAY more (and Holostars too, but that's another topic), but I understand Cover's decisions to forbid them from doing so.
I think the most reasonable way to solve this problem would be dropping ca. 84000 nuclear bombs on China to make sure you cover the entire area.