I happened to notice that WN finally has removed references to DING! from email confirmations, and the download link now redirects to this
FAQ page:
What Happened to DING!?
DING! is now retired but you can still stay on top of our best deals on flights, hotel stays, car rentals, vacation packages, and more when you sign up for our weekly Click ‘N Save emails.
Sadly, this is another reminder that the days of great low last-minute fares are definitely over.
