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AFAIK FB will do semi-targetted advertising based on IP alone if there's a very small number of users logged in from that IP.

• mard 8y ago
  That happened behind my ISP's NAT in a densely populated area, so I don't think so, no.
  • gsnedders 8y ago
    I'd be surprised if it was the only thing they used, to be fair. But there is fairly obviously some IP-specificity going on.
  • tinus_hn 8y ago
    So you need to control your IP address but your example shows it doesn't matter?
• Tsubasachan 8y ago
  On mobile your IP will change every few hours. Anyway the very idea that people are making money from me keeps me up at night so I use FF with a bunch of privacy aiding extensions. The war to fingerprint users is endless though. Ad tech is a billion dollar industry.