And there is a followup from Forbes.
What Target discovered fairly quickly is that it creeped people out that the company knew about their pregnancies in advance.
“If we send someone a catalog and say, ‘Congratulations on your first child!’ and they’ve never told us they’re pregnant, that’s going to make some people uncomfortable,” Pole told me. “We are very conservative about compliance with all privacy laws. But even if you’re following the law, you can do things where people get queasy.” – NYT