I seem to have the opposite problem, I've received the Security Key 100 Cartel Coins but I haven't yet received the 600 Cartel Coins per month from my 6-month subscription. Can't seem to find any information on when I should receive those coins either, my current subscription is due to renew on 01.14.2013 so I'm wondering if the coins should be received on the 1st of the month or on the 14th of the month.
Same. Exact. Problem.
I find it weird that we got our monthly Security Key stipend of coins, but not our subscription. I hope they fix this asap.