Nexon's costumer service and community relationship.

Although you definitely bring up some good points, I'm inclined to give Nexon the benefit of the doubt. The fact that the dupe was made public on New Year's Eve proves that this was planned to some degree to impact Nexon and the MapleStory economy as severely as possible. Although it is true that certain professions do not get breaks for holidays (news, entertainment, public workers, etc.) I sincerely believe Nexon had left things on autopilot because of the holidays as nothing, to my knowledge at least, has ever occurred on New Year's or other holidays (other than 2x events failing).

Nope. Dupes and exploits are always the most prevalent during the holidays. They are clearly brought out to do as much damage as possible and they come out every christmas/new years without fail for the last several years. Enough times to justify a team that has no plans being kept on with the authority to act during those days.