User blog comment:DaNASCAT/Technical Update: March 21, 2016/@comment-4129195-20160321231317/@comment-24739709-20160321231944

We're working on those recommendations every week. We have some third party software, as well as our own in-house engine, and we're testing the engagement on both.

This is still just a test running on less than ten percent of traffic - we're being cautious with it.