Just before holidays a colleague of mine asked me if Amazon and Toys"R" Us were involved in behavioral targeting.

He told me that he did a search for Lego on ToysRUs and a few days later when he visited Amazon, he saw Lego featured on the home page. He said that he had never did any search for Lego on Amazon.

I looked at the code on ToysRUs and did not find anything that looked like it is sharing data with Amazon.