My recommendation would be to spend the time building more backlinks to your site, not someone else's.
Why only earn a small share of the link value when you could get the lot? You'll get better return on the time you invest link-building.
I'm my experience it's best to just move on and build the next link than worry about the one you've already got. Do your research first, check the domain authority and the page authority of articles that are currently in the same place on the site that you expect your article to be posted. (That way you can estimate the likely page authority).
Another thing to consider when guest-posting is direct traffic. Check the number of subscribes blogs have and see if you can get guest-posts on those. Look at the content that works on their blogs (the ones with the most tweets/comments) and the kind of headlines that seem to work. You can often see patterns!
Hope this helps!