Just had to call because my latest statement dropped the credit. After much arguing, and ending up with retention, I have the credit for another 24 months. Hopefully by the end of this term they won't charge an HD access fee.
BTW, they claim the postcard was simply a reminder to keep auto pay/paperless for the credit, not anything about an extension. I'm quite sure the card I received talked about extending for 24 months, but I tossed the card. Anybody have it to confirm?
I have it, and it does!