I just saw a comment that stated that community wiki is dead:
What does that mean?
The OP was just stating that if you do not want to seem like you are "farming" rep, mark the post as community wiki.
So what does that mean that it is "dead"?
It means that it is no longer an option when asking a question. The checkbox is not there anymore and you can't create a CW question.
It is not quite the case that it is dead, as you can flag a question to moderators to make it CW and answers still have the checkbox.
What is the case, is that its use has fallen drastically. Virtually no posts are CW anymore.