WhatsApp Cofounder Brian Acton on Farcebook ZuckFuckery

Later he learned that elsewhere in Facebook, there were “plans and technologies to blend data.” Specifically, Facebook could use the 128-bit string of numbers assigned to each phone as a kind of bridge between accounts. The other method was phone-number matching, or pinpointing Facebook accounts with phone numbers and matching them to WhatsApp accounts with the same phone number.

Within 18 months, a new WhatsApp terms of service linked the accounts and made Acton look like a liar. “I think everyone was gambling because they thought that the EU might have forgotten because enough time had passed.” No such luck: Facebook wound up paying a $122 million fine for giving “incorrect or misleading information” to the EU—a cost of doing business, as the deal got done and such linking continues today (though not yet in Europe). “The errors we made in our 2014 filings were not intentional," says a Facebook spokesman.

https://www.forbes.com/sites/parmyolson/2018/09/26/exclusive-whatsapp-cofounder-brian-acton-gives-the-inside-story-on-deletefacebook-and-why-he-left-850-million-behind/