Just to clarify:
Agent is not a mod. A username in Green means a user has attended a certain number of the (now sadly dormant) hexus social events.
I am a Moderator. My name is in Red, and my job is basically keeping an eye over the forum in general (and for me, For Sale) to ensure that people post within the rules and to delete the huge amount of spam that hexus attracts. If you're thinking that you rarely see spam on hexus, that's because the hardworking Mod team (and some clever auto-mod tools written by the web team) keep most of the spam from being seen by regular users.
Zak is an admin - name in Orange. Admins are responsible for the smooth running of the forum, for taking decisions on any changes we introduce (like reorganising forums or changing rules), and also for trying to keep the forums generally in line with the atmosphere we want to promote.
All mods and admins are volunteers, and we do the best job we can in what little spare time our real lives allow us. So if Zak hasn't answered straight away, it's probably because he's doing something in real life. I can't speak for Zak because I personally haven't been involved in this discussion, but yes, all admin decisions will be the result of discussion amongst the admin team (often, but not always, including the moderators). And some times the reason is - as Zak said in his original post - that the opinion of the admin team is that it's time to move on from a subject.
EDIT for crosspost:
I wouldn't have an issue with that, but as I say above I wasn't directly involved in the discussions that lead to Zak's post. You'll have to wait for Zak or another mod/admin who was involved in the discussion to confirm.