Unsolicited Artwork is created from a simple idea. "If there isn't any work, make some." 
Rather than spending endless hours presenting yourself or trying to pitch things that turn around to get caught up in delays, or countless bureaucratic issues. Just create the art you want to make, and present the finished product. Through this some wonderful work has been created and connections made. Because of this positive response, you can now even solicit the unsolicited if you'd like!