I still think he should just allow custom assets to be used. He has a dedicated fanbase. Dedicated fanbases will go out of their way to create and improve content if given the chance. Just look at games like dwarf fortress and minecraft. I don't know much about his games, but it seems like, especially with a kickstarter backed project, allowing custom assets would be the best of both worlds. He could release his game with its 'cheap bastard art' and fans would step in to make their own art. Which might help actually get him some new fans without any extra cost. Some people just like to customize things because they can.