Important to note that implicit in this example is that you're meeting with friends/acquaintances who are in positions to refer you to this kind of work on a regular basis. That's the other side of networking - if you're not a naturally outgoing person it means putting in the effort to socialize with the right kind of people regularly and make sure they know what kind of work you do / skills you have.
If people don't like doing it,then they need to make sure the entire internet knows about them: bligs,articles, etc. This is one of the ways for introverts to deal with it.
