I'm not speaking for him at all, but I agree, it is very good and useful what he's written here. I would also say why it is. For one, as I've mentioned in other comments on this page, it's helpful to know which tags you're using are doing what in terms of rewards. That way, you can determine if those are the tags you want to continue to use or not. I think it will also help in determining what might be most appropriate to use subject wise, since tags that are used that aren't quite on topic won't do as well as those that are, and may even get flagged for perceived misuse. Kind of like comments.