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People should also include credit card companies as they've been tracking purchases and inferring data long before Facebook has existed.

• dylz 8y ago
  you forgot selling all of the purchase data.
  • redbeard0x0a 8y ago
    of which I'm sure facebook buys...
  • justadudeama 8y ago
    Do you have a source for this?
    • dylz 8y ago
      http://partners.exelate.com/media/1/_orig/1426866843-8791.pdf http://partners.exelate.com/media/1/_orig/1426866843-8791.pd... http://adage.com/article/digital/facebook-partner-acxiom-epsilon-match-store-purchases-user-profiles/239967/ http://adage.com/article/digital/facebook-partner-acxiom-eps... https://adexchanger.com/ecommerce-2/purchase-data-playbook-marketers/ https://adexchanger.com/ecommerce-2/purchase-data-playbook-m...