When I go into a shop and buy a newspaper, the shop owner doesn't know how I came to the decision of going to that shop. They would like to know this informati

When I go into a shop and buy a newspaper, the shop owner doesn't know how I came to the decision of going to that shop. They would like to know this information, and could probably do better business if they did know it. But it would be a breach of my privacy for them to know this information without even asking me for it. I don't see why websites should continue to be treated differently, just because historically they have been...