My site would be;
The tag along comes after the '='
It looks just like what a linked back affilate (link) would look like, but on this particular site, there are no affiliates.
Just started showing up around the first part of November, and struck me as quite odd.
Could it be some kind of referal spam that I'm not aware of?
The site is pretty new, 1-2 years, and though we have sites that are much older, 6-7 years, this is the only one these odd url's have shown up on.
It hasn't ever had any other scripting (boards/forums/blogs) that might cause someone to want to come knocking on the back door.