Took a look at the Nexon "careers" page

When you're being paid less than your skill level, it's quite discouraging. But there is no incentive to let you learn the game, since you won't be there long. Example: I'm hiring you as a GM for Hello Kitty Online, You'll be working this game for a month, you must find x amount of people breaking rules and answer x amount of tickets a day. Once you're there you'll ban anything that looks suspicious, and ask questions later, since more than likely by the time the ban needs to be reviewed you'll be long gone.

Well, that's the good thing about Nexon, I guess, since according to an interview I vaguely remember reading, they require evidence to be collected in a case file before a ban is issued.

I was very active during the time they announced that volunteer group and saw no involvement from them other than those lame introductions they would post about themselves on the main site. The game was still in very bad shape then and Nexon is actually better right NOW than they were when MWLB was out. If they interacted with 1% and you were part of that then that's cool I guess, but other than that their presence was barely felt.

Though I am not so sure about them being better now anymore though ever since the anniversary patch. But prior to this everyone could say Nexon has stepped it up and patched some major public stuff that was very damaging to the game amongst other things.

I reckon those weren't actually even typed up by the brigadiers themselves. Those posts have such a "Nexon community temp employee" feel to them, and they match in prose with a lot of the other blogposts of the same era.
I'm looking at some old forum archives, and it seems like the MWLB was designed to be really -- ah, clandestine, I suppose. That might explain why we never got to see or hear much anything from them.