Even more fun is if, even signed up, you never use their GWT because it Doesn't Work As Advertised and some of us Just Don't Drink The Kool-aide (but we do check back from time to time to see what's happening on the Kool-aide front).
Stung twice in recent years which makes me three times leery of results... but that said, there's is a kind of drive-by traffic accident fascination as regards google products these days.