I don't know if it is uniquely Chinese, but lots of Chinese comment threads are like this - people like to register simple approval or disapproval (or comment-t

I don't know if it is uniquely Chinese, but lots of Chinese comment threads are like this - people like to register simple approval or disapproval (or comment-to-receive-updates). It's not 'spam' but maybe kind of bewildering to an HN audience where every comment is expected to be substantive.