I'm not sure, but I think I know why.

Recently, I bought 60 days WoW US game time (MYR85 each) from them, and found that the code have been used. Befuddled, I submitted a ticket to rectify this issue. I thought this may have been a fluke, so I bought another unit from them, and found it has been used too. I wasn't amused, and immediately filed a complaint to them, voicing out my disatisfaction. It's been days now, and still no reply from them.

I think this may be the reason why they're not selling them for the time being.

I bought another unit from Offgamers and it works fine. All in all, I spent MYR250 just to top up 60 days game time.