This happened to me all the time on LinkedIn until I cancelled my account. The notification would say 'so-and-so invites you to [whatever] on LinkedIn', but so-and-so did not invite anybody, it was a linkedin bot trying to build traffic

Whats amazing and a bit scary though is how social media knows who you know. I understand how they do it, generally speaking, but Facebook and the like has identified people I haven't even thought about for 30 years.

But then, Google knows if I searched for something on Amazon on my work computer, to show me ads for that product on my home computer, even though the 2 computers are not linked in any way except they both know I have an amazon account.  So I shouldn't be surprised.

 

Twitter/etc are not your friends. uBlock Origin and Privacy Badger are.

Ive not heard of Privacy Badger. Ill take a look. Thanks