I must admit, I have a Pinterest. And it is for a selfish reason. I originally opened an account to promote my blog that you are reading right now.
I created header art and I went through some old posts and added pictures. It is not an easy task finding pictures that relate to my posts.
Has this worked? Probably not, my Pinterest boards do not get enough traffic to useful and to be; truthful, I do not know how to increase my Pinterest board traffic. But there was a slight increase to some of my posts. I know people see my pins because they are repinned. But they do not often visit the orgin site, i.e. my blog.
What can I say, I had to try something new.
Let me know how you promote your site/blog/twitter feed, I am interested to know.