Here is another anecdote. I was talking to a friend through a WhatsApp voice call. During the call he told me that he had just bought an air hockey table. Later

Here is another anecdote. I was talking to a friend through a WhatsApp voice call. During the call he told me that he had just bought an air hockey table. Later that day when I logged in to Facebook, I see an ad for an air hockey table. Creeped the hell out of me.