Halloween, challenge why did they turn it off

Because it's not an achievement. It's a banner reward.

.

Challenges > Halloween Challenge > Press X > Job done.

Halloween Challenge:

.

October 31st – November 5th (9:00 a.m. PDT)

.

Unnerving reports from the front indicate that the Collector reinforcements are more numerous than we feared. At this point, we do not know if our numbers are accurate or if psychological warfare is at work. We need to engage the enemy to assess their true
strength.

.

Halloween Challenge – Complete the three Halloween challenges to earn the Halloween Challenge Banner.

.

Ghostbuster: Requires 5 extractions on Firebase Ghost or Firebase Ghost Hazard

.

Zombie Hunter: Requires 7500 points against husks/abominations.

.

Monster Killer: Requires 10000 points against brutes/scions/praetorians/banshees.

.

All challenges can be completed on any difficulty.

.

Source:
blog.bioware.com/.../mass-effect-3-multiplayer-halloween-challenge

.

Bryan Johnson on the BSN posted the rewards for this mini challenge.

.

Banner yes,

Challenge points yes

.

Commendation pack, no

Progress on Squad Elite, no

.

Source:
social.bioware.com/.../14756244&lf=8

.

Fully unlocked the Batarian Brawler Vanguard (all appearance options)... pretty effective class imo. Biotic Charge, Lash and Blade Armor work well with this class. Never liked Batarians, but this guy has grown on me.

@Tatakai Carnage does have a challenge. It's under the Blood Pack Mastery section.

-

-

Are we gonna lose this Halloween banner after this challenge ends?

I dilligently check for the challenges every fri faithfully & none were listed in-game challenges menu, nor did the Operation Screen precede the MP main menu screen; where again (as previously mentioned), it was not on my challenges category. Only thing
there listed specifically for Operation Challenges, is the "Halloween Challenge set title". That itself struck me odd, considering its the only challenge op that's remained there after receiving the next one. Am I missing something here?

LOL! They're gonna make us clean up all those leftover pumpkins from the Halloween challenges...