Yahoo! has joined Google in securing their search queries but unlike Google, they aren’t passing referrer data. This is annoying as it severely understates SEO traffic. Right when I think all is good again after Apple begins to pass iPad Google referrer data back in Fall 2013, we now get this. Yahoo! please add back the referrer!
SearchEngineLand has an article on Yahoo! passing no referrer data.
We noticed a significant decline in our Yahoo! traffic on January 11th, 2014 however I believe that Yahoo! traffic started declining earlier than that (late 2013).
What have you all seen?