I didn't get a letter. Two shady characters showed up at my door and strongly suggested I pay up. Said something about waking up with a horses head in my bed if I didn't.
I had to renew -- and the renewal took place immediately! Otherwise, it was not letting me send any more private messages due to a "full mailbox." Now, I scoff at your full mailbox!!
Just realized I'd let my premium membership lapse and renewed. I figured I'm not the only one. If you're getting anything from this site (I know I've learned a ton), a premium membership is a great way to say 'thanks', and help offset the costs of keeping this place running.