if the requests are all serialized, if the ping time is like 300ms, and if each request takes like 100ms of CPU time
that means you only need 648,000 actions in queue to equal 3 days
when you consider that even upvotes/downvotes of posts/comments count as actions, I could see it happening
but the queue isn't completely serialized anymore, so maybe this number is still a bit unbelievable (EDIT: seems like LW has not yet enabled the feature for parallel sending)
I figure this could be reduced a lot if even just 1 minute worth of votes were batched together, although I don't think the ActivityPub standard technically includes batched activities currently