What’s a copywriting blog for?

I had a comment a couple of weeks ago that some of my early posts (this blog is only two months old!) were nothing but self-promotion.  This was never my aim.  The intention was to give a new blog some kind of perspective.  This is because  I feel that no-one ever reads the supplementary pages of a blog – life’s too short! I’d be interested to hear what other people’s views  are on that.