To be honest, I do not care about achievements badges - they often cause more trouble than good for wikis. I think Wikia did the right thing removing the feature from new wikis (which was done over a year ago). While I'm not removing the achievements from this wiki (yet), I'm not going to promote them either.
re: admin/content moderator - I'm not opposed to having more staff on this wiki, but you've got to give me a better reason than achievements. (btw, see User blog:Janus100/Open Call for Admins)