That would only work going forward. You wouldn't be able to merge the data retroactively. And why would they do that is the question. Again, since they don't s

That would only work going forward. You wouldn't be able to merge the data retroactively. And why would they do that is the question. Again, since they don't serve google cookies on analytics this would be virtually useless. An IP address isn't much to go on. Even a 5% misidentification rate would lead to horribly polluted data about users very quickly.