

My guess is that in some form they track contacts and link clicks. I genuinely don’t think they’re reading messages, but I think they do know eg that Bob is someone that likes to send people links and that there are 5 people that always open those links. So they may have directed model of linked topics between people.
Even if this isn’t true though, owning WhatsApp probably gives Meta a lot of culture impact in a similar way to Google and Gmail. The fact that they could create their Meta AI model and put it in front of like a billion people overnight won’t be lost on shareholders.
Oh sorry, I’m not denying that at all. I was only drawing on the comparison of Gmail being pretty ubiquitous like WhatsApp is.