HeadhonchoII talks to us from the past with a lot of wisdom :).
Apart from FB sending an invitation or not they were building a database of all the contacts list details who were not on FB, they were retaining that information .
Almost nobody noticed or cared.
When you signed up to Facebook they probably already had your address and telephone number in many cases and knew who you were connected with already. Just because they don’t list your telephone number or address on the homepage doesn’t mean they don’t have that info already in their database (the main reason to buy WhatsApp was the telephone numbers Im pretty sure , Instagram is probably to analyse all your photos using facial recognition and object recognition ).
Another company that is getting way too much of a few pass is Google. Google is as bad or worse, tracking your movement, trying to get you to confirm where is home and where is work, going through your emails to analyse you and sell you stuff.
Then you get idiots (sorry) who buy smart speakers from companies that are actually recording everything you , your family.and your visitors are saying all day.
There’s nothing wrong with using an intelligent assistant but why does it have to act as a spy to do this?