Your description reminds me of the Target/pregnancy story from a February[1]. The evidence there proves it's possible. The question then: Is Facebook's data as

Your description reminds me of the Target/pregnancy story from a February[1]. The evidence there proves it's possible. The question then: Is Facebook's data as good as Target's? For Facebook, certainly. Can they get away with exposing that information to advertisers? I'm not sure. [1]: https://news.ycombinator.com/item?id=3601354 https://news.ycombinator.com/item?id=3601354