This morning I received a comment from Shell Fruscione, a Community Manager with Beknown on Facebook (I'm glad to know they're listening). I learned that a few days after Monster launched Beknown, Linkedin cut off API access. So in the interest fairness, here is the link to the blog post on "MonsterThinking".
"Monster Response to Linkedin API Shut Down"
If you missed the review here is a link to the post "A review of the Beknown app".