Yea it's not about 'being invited' or 'not being invited' people.
It's just generating conversation about who we think might be interesting to meet ... and often we might be interested to meet someone we DON'T already know so well. So 'existing friends' shouldn't exactly be upset ya know?
It was just designed to provoke some discussion and some good vibes and maybe even make people think about who they might like to know a bit better on the site who they don't already, thru PMs or whatever.