I don't use pre-paid. I use a credit card to pay for my subscription and always immediately cancel right after I renew.
I dislike auto-renews and auto-pays not just for this game, but for anything that isn't a necessary utility bill. It also allows me to take a break for a few days at the end of a month when I have other things to do.
So I don't get the 5 day credit for all the crap when I couldn't play right after launch?
My time is going to run out soon, might not bother at all if they are going to be this petty.