How do comment voting and flagging work?
I'm curious as to why comment upvotes are a feature, if they are not worth any reputation ( I thought at one point they were worth one). I know not everything should be done for reputation but sometimes I see a comment I like and I upvote it however the person posting it gets nothing from that upvote (or probably even any indication that it has been upvoted).
I did search MSO and gave up after two pages from this search string (http://meta.stackoverflow.com/search?q=why+upvote+comment).
Edit: in fact sometimes a comment in an answer or a question is more helpful than any of the provided answers.