An advertising company knows I travelled to wikivoyage and spent lots of time reading about Thailand. They then know that I (same cookie) visited cnn and read

An advertising company knows I travelled to wikivoyage and spent lots of time reading about Thailand. They then know that I (same cookie) visited cnn and read about Ebola They then know I visited a cycle magazine and read about a new bike. With proxying they wouldn’t be able to link those three visits together (with cookie data) When I visit a fourth site, it’s a brand new visit - there is no way for the advertising. Company to know I’m the same version who visited the previous sites.