I've marked post Can TAFE Assignment Help Improve Results Without Extra Stress? as 'other' (number of options might be a bit larger, like 'spam' for example) and received an email about the queue. Queue is empty.... post with spam is still visible.
For the past week I've been getting forum Moderation Digest emails daily, saying there are items in the queue, but when I open it, it's always empty. I guess related
I'm getting emails with title: "Moderation digest — 0 post(s) awaiting review". IMHO, I don't think these emails serve any purpose. There's no need to be notified that there's nothing to do... :-)