If "999" refers to a very specific service, platform, or promotion:

JioCinema launches ₹999 yearly subscription plan for Hollywood content. IANS. Sources in Viacom18 said the idea is to have only on... The Economic Times

The 999 wasn't just entertainment. It was the ultimate popular media: a mirror. It was the world watching itself, one exclusive, fleeting moment at a time. And as the timer hit 00:00, the screen went black, leaving Elias in the dark, waiting for the next key.

Elias froze. He looked at the screen, then looked at his own hands. The man on the screen did the same.

The content degrades in value as it moves down the ladder. The 999 version is the Week 1 IMAX print signed by the director.