Could mean that they've a big, but controversial, reveal and they're afraid of people going rogue on open mic (as has happened in the past)
Or perhaps it's on Microsoft's account? They've a big deal going through, I'm sure they don't want to risk people going rogue and attracting the wrong type of publicity for the sake of that.
We have the april's fool joke guy to thank. Regardless of how bad of an announcement it was, no company can open themselves to that after it's popularized.
Edit: Btw. My name is Iriscale from the guild Swords for Everyone - Wyrmrest Accord (H) - US. I want to say hi to my guildies, and a special callout for my mom, who gave me life. My question for you today is, are we ever getting a colibri mount?
Insert second Q&A question here asking about a very specific gun model that hunters don't have as a mog option yet in the game, and whether there are plans for that + a background story about how they have personally been a gun lover since early childhood, when they went out to the shooting range with their great-grandpa
"Friday, November 3
20:30 GMT —World of Warcraft: What’s Next
Members of the World of Warcraft development team discuss the latest content coming to Azeroth.
19:30 GMT —WoW Classic: What’s Next
Members of the WoW Classic development team discuss the latest content coming to Azeroth"
There's no way to reconcile those times with the official graphic, regardless of time zone conversion