The site appears to function as a portal for redeeming "codes," likely for content access (such as advance screeners for critics or promotional events).
The domain was a ghost—unregistered for decades, scrubbed from every search index. But Kael’s mother, a legendary programmer who vanished when he was seven, had left him a cryptic note: “When the firewalls fall, find NBCU Codes.” nbcucodes.com
He pressed enter.