This says it all: "…after Apple announced they were sun-setting MAC address Wi-Fi triangulation, the two companies decided to adopt new Apple iBeacon standards…" http://techcrunch.com/2014/11/04/how-the-49ers-are-using-beacons-to-help-you-find-hot-dogs-and-beer/
I totally called it: http://aaronparecki.com/articles/2014/06/09/1/ios8-wifi-changes-privacy-win-or-ibeacon-lock-in
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