They did not. Opt-Out is not asking for consent. And even if you Opt-Out, WhatsApp will submit your data to facebook for analytic purposes.
The real problem here was quoted as "misdirection of the [whatsapp] users and the public" because WhatsApp stated that there wont be any data exchange between them and facebook, when they were accuired two years ago.
The real problem here was quoted as "misdirection of the [whatsapp] users and the public" because WhatsApp stated that there wont be any data exchange between them and facebook, when they were accuired two years ago.