Why are there so many comments that start with “@five”? I feel like there’s something about how the site works that I’m misunderstanding. Isn’t the user who posted the article automatically notified when someone posts a comment?

He was at Unity for nine years.

Removed by an admin or another mod? There aren’t really enough details in that story to know exactly what happened. It also seems strange that it says the sub went public briefly and then back to private. That doesn’t really sound like an admin forcibly stopping the blackout.