Their opaque moderation tactics also killed it. There were the transparent obscenity warnings, but then there were also shadow downvotes for certain terms that

Their opaque moderation tactics also killed it. There were the transparent obscenity warnings, but then there were also shadow downvotes for certain terms that even closely resembled a human name, which was rife with false positives. You could talk about a street with a human name and 10 minutes later your comment was voted out of existence.