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A comment on Why we don't sell ads – WhatsApp Blog. Parent comment

Re:Why we don't sell ads – WhatsApp Blog by wmt on Monday April 20, 2015 @10:06AM (#9408140)
How would they link your whatsapp account to your facebook account? Whatsapp only knows my phone number and what phone numbers I contact, and my facebook account doesn't know my whatsapp phone number.
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Re:Why we don't sell ads – WhatsApp Blog by joeyspn on Monday April 20, 2015 @10:16AM (#9408210)
Because Facebook knows my mobile number... I provided it long ago (IIRC for setting up some ad campaigns or was required as anti-spam measure)
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Re:Why we don't sell ads – WhatsApp Blog by Psion7 on Monday April 20, 2015 @10:59AM (#9408513)
If you have WhatsApp and Facebook or Facebook Messenger installed on your phone then they are aware of each other and can exchange information freely.
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