In other words – silly you – you gave Google permission to track you simply by engaging in activities that allowed it to track you.
In other words, piss us off and we can release a dossier about you as thick as a phone book (figuratively speaking). Could such a contract be valid – one that is all at once so invisible to users and so maddeningly all-encompassing or even threatening? This is for judges and regulators to decide in coming years.
In the mean time, I guess Google's ... well, you know.