Usually these would have a political agenda but a surprising number have instead been commissioned as gifts... for that “important birthday”; framed as a keepsake for a boss who's retiring or to commemorate an important trip. The airport commissioned a very nice set of these for Bob Parker when he visited Malaysia to promote Christchurch tourism after the quake. As an entirely different approach I've been brought into a shop to do fast sketches of their customers over an afternoon to celebrate the anniversary of Charles M. Schulz! THAT was so much like a Rock n' Roll gig. One company I heard of commissioned caricatures of their salesmen for emails, letterheads and ID badges. In fact their customers found it easier to remember a face than a name.