There are a couple of implications of this for domain investors. For one thing, I don’t think Safari users who are opted-in will be able to visit a PPC landing page. This would reduce parking revenue since redirected visitors can’t click PPC links. In addition, Google may redirect people away from domain names that are for sale but not developed. Someone who visits a name I own that is “for sale” may get redirected elsewhere and the visitor will assume the domain name he checked is already developed.