What do you think is the practical difference between “track[ing] across sites” and “information maintained about their interests and behavior”, and “retargeting people who have visited her own site”?
It doesn't, or shouldn't, involve a third party knowing about what sites I've visited. If the baker knows I go to their bakery every tuesday, that's normal; if they know I go to the butcher's every wednesday, that's creepy.
“We just attach a beacon to everyone who visits our site so that when they walk in front of billboards our ad is shown but we’re not like trackkking users.