Good work! We'll never be able to 100% wipe out abuse, but we can dramatically reduce it by downvoting it when we see it so it's less likely to be profitable.
I think comment cloning is actually a particularly destructive form of abuse since it actively disrupts and impedes discussion. If someone leaves an insightful comment on a post and it's immediately cloned, the post author and other readers have an additional barrier in determining who they should reply to for a constructive discussion.
This is one of the downsides of comment plagiarism. It is very funny since comments are a way of building relationship with the author. Gaming it for short term value won't help anyone in the long run
Sure it won't help anyone in the long term but do you really think that someone who does that thinks about the long term?
yep.