Presumably it's not a technical limitation, since an importer could be written and added by some instances, even if not accepted upstream. If the lack of impor

Presumably it's not a technical limitation, since an importer could be written and added by some instances, even if not accepted upstream. If the lack of import is caused by policy conflict or cost for administrators to review bulk-imported content, does this encourage individuals to have a paid instance to aggregate historical content, e.g. https://masto.host https://masto.host.