It doesn't have to be out of context: not all comment threads are equal, and it makes a lot of sense to pull to your feed certain threads based on the aggregate

It doesn't have to be out of context: not all comment threads are equal, and it makes a lot of sense to pull to your feed certain threads based on the aggregate upvote count of all comments in the thread (or just pull the whole thread if it has any highly upvoted comment). That's easily a good way to de-noise any popular thread (which could be a non-productive flame war)