19 ms·

That's a very misleading way of putting it. From your own article: > In addition, Google does not know what products people bought.

• GeekyBear 8y ago
  Of course not. Whose credit card statement includes a listing of the individual items you purchased at a store during a particular transaction?
  • bduerst 8y ago
    It's not in the statements that you received, it's a reciprocity agreement between retailers and CC companies to share the data by CC # For example, CC companies could give you your itemized purchase history for Macy's on your statement, if they wanted to.
    • londons_explore 8y ago
      It is my understanding that most stores do not share that data, because they feel it is a significant commercial advantage. Credit card companies have wanted itemized transactions for aaages (it's even part of the protocols they use) for fraud prevention, but very few merchants have agreed.
      • bduerst 8y ago
        Not for SMBs, but major retailers share the information keyed of CC# as part of reciprocity agreements, including Amazon.