CIA/NSA/DARPA usually insert their users into moderator positions and control speech from there. They have accounts in charge of multiple subreddits, then they ban accounts of real people fighting the system.

Multiple moderators of that sub have been suspended. List of moderators: https://old.reddit.com/r/WatchRedditDie/about/moderators

Moderators suspended from Reddit:

https://old.reddit.com/user/Bowles14/

https://old.reddit.com/user/mycatiswatchingyou/

https://old.reddit.com/user/DevWolf59/

https://old.reddit.com/user/blatantshitpost/

https://old.reddit.com/user/Internet_Censorship/

https://old.reddit.com/user/yeahyerright/

https://old.reddit.com/user/__Aquatic/

https://old.reddit.com/user/MydnightDesign/

The moderator who closed the sub is an astroturf. He's a moderator of multiple psyop subreddits on the conservative side and only joined r/watchredditdie 4 months ago: https://old.reddit.com/user/Potens_Loqui

Look at another mod of r/watchredditdie, he moderates 243 subreddits: https://old.reddit.com/user/justcool393/

This one moderates 287 subs: https://old.reddit.com/user/cojoco/

394 subs: https://old.reddit.com/user/N8theGr8/