Article level metrics are now incorporated in Science Direct (Elsevier), Wiley and Sage publications.
The value of this to a researcher may mean finding new collaborators or communicating research results to a wider audience.
For example, take a look at the article from a CUA researcher and collaborators Performance pay or redistribution? Cultural differences in just-world beliefs and preferences for wage inequality by Douglas H. Frank, Klaus Wertenbroch and William W. Maddux. This article was published in September 2015 and has been tweeted 3 times.