The most common non-cookie based tracking are cross-device graphs that are registration based (reg based) and run by facebook/google/linkedin/pinterest/etc. If

The most common non-cookie based tracking are cross-device graphs that are registration based (reg based) and run by facebook/google/linkedin/pinterest/etc. If you've ever logged in to facebook (or haven't logged in) and a site has a fb pixel or share button, its much easier for them to track you. These all have cookie/nonreg-based components, and there are plenty that don't rely on reg based data at all.