In the last few months, I realized some people whom I really don't know are adding me as contacts in Linkedin. What I realized was that :
0) they had nothing to do with my industry, we had nothing in common.
1) most of these people had just joined Linkedin and had 0 contacts.
2) either their name or surname started with "a", which is my first name's and
I guess Linkedin devised a "dummy" algorithm for the newcomers. They redirect them to random people with the same initials to integrate them to the system (make their graph more connected). Weird.