When I signed up for Google Plus, it recommended 500 people for me to invite. You know, and once I invited those 500 people I got another 500 people. So it has a huge install base that it can start from.
There are bands that I am friends with, who will invite me up on stage. Like Les Savy Fav, who have had me on stage, and I have played on their record. There are a couple of bands like that. Yo La Tango has invited me to play with them.
The most interesting characters keep us hooked. Not likeable ones! Iago, Shylock, Darth Vader - are they likeable? Do you want to invite them to dinner?