While not banned or quarantined, /r/Drama has been significantly restricted. It already had to ban user pings and slurs, and has now been forced to ban all links to Reddit, including archive links, and even merely mentioning subreddits, which was the vast vast majority of the sub.
You already know the answer. Basically, it wasn't leftist enough.
If you're a leftist/sjw sub like AgainstHateSubreddits, or TopMindsOfReddit, you can link to as many posts/comments as you want, and brigade as much you want. If you're not, all of a sudden, it's "against the site rules", and they come after you.
from https://www.reddit.com/r/reclassified/comments/i58dtj/rdrama_neutered/
You already know the answer. Basically, it wasn't leftist enough.
If you're a leftist/sjw sub like AgainstHateSubreddits, or TopMindsOfReddit, you can link to as many posts/comments as you want, and brigade as much you want. If you're not, all of a sudden, it's "against the site rules", and they come after you.