Klout

 Klout  was a social rating service based on having users sign-in to a few silos like Twitter, Facebook, Google+, LinkedIn, and analyzing their total followers and subjects discussed across the silos, producing a single score up to 100 as a measure of social media influence. It shut down on 2018-05-25, likely coincident with GDPR being in effect.


 * https://www.theverge.com/tldr/2018/5/10/17340714/klout-lithium-social-media-reputation-tool-clout