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The solution is new laws preventing any company from doing it. As you point out, anything voluntary is doomed to fail.

• product50 8y ago
  Totally agree. Either put in regulations or mobile OSes move away from device IDs for tracking to something more transient - which makes it very difficult for FB and Goog to ID users accurately.
  • untog 8y ago
    I believe iOS already does this - different apps are given different unique IDs. But I'm sure it's possible to match back up again when you also have IP addresses, user agents, cookies and so on.
  • product50 8y ago
    No - they do not. All apps pass in the same IDFA or device ID today.