If I missed this in a previous thread, my apologies. My search fu is not strong. Is the time limit on the double XP thing in game hours or actual hours?
If I buy 4 hours worth, play for an hour and come back say, 6 hours later, will it have expired? I typically just buy enough to cover my current play session, but occasionally I'll log in and go straight into a mish, forgetting to re-up first.