I just spent a few hours adding pictures to my poems. I think they add a lot. The pictures sometimes merely illustrate the poem, but sometimes they add an extra message--ironic, satirical, reinforcing.
I did it because I started a pinnterest board called News Print Poetry that will feature the picture each day with a link back to the post on the blog. It promotes the blog and the blog promotes my books and my public speaking career which in turn promotes the blog and so on. At least that's the theory.