Make sure you did not accidentally un-subscribe.
I noticed the same about a year ago. Hopefully you have an old e-mail in your inbox, deleted box, spam folder, etc. to access it via that link and "re-up" the status to receive updates. This is what they told me to do when I e-mailed to inquire. I had an old e-mail from them and corrected the non-sending issue and receive something now at least once a week.