Online Payment System
According to my personal opinion, KONAMI wants to make assurance doubly sure on the stability of the online payment system. Particularly, their Login Server looks quite vulnerable to heavy access. Before now, whenever they try to launch new service (e.g. character data transfer), the login server always went down!
p.s.
Kagayaki game server has gone down. Bugs and things happen all the time. I hope it will be solved soon.