[robjan]

How are WhatsApp chats used to influence advertising? They are end to end encrypted.

[gooddelta]

That's partially true – but end-to-end encryption is different than zero-knowledge. I design the latter.

Although LifeHacker isn't a great source, they do a good job of pulling more credible sources together into this article: https://lifehacker.com/stop-using-whatsapp-if-you-care-about...