2019-04-01 UTC
# 
fr33domlover cjslep[m], but that works only for the followers collection; some collections aren't the standard AP ones. I suppose in general due to inbox forwarding it's enough to send an activity just once to each host on which we address at least one collection? Like, even if it's not the owner of the collection, it could be something from attributedTo? Or context, or tag, or whatever?