I am seeing referral traffic (not a great volume) in GA coming from googleadservices.com - I suspect that this is actually traffic coming from paid remarketing ads so why would this be logged as referral and not cpc by GA? Has anyone else experienced this and found an explanation?
It is spyware as according to this site:
When your browsing experience is disrupted by annoying third-party banner and pop-up ads, Google Lead Services could be the one to blame. Although its name may suggest that it has something to do with Google, the truth is that it does not.