Well, his movies are financed from a lost Nazi gold treasure.
From Postal, where he plays himself:
"Boll cameos in the film [Postal], dressed in felt hat and lederhosen, boasting that his films are financed with "Nazi gold", and declaring his priapic enthusiasm for young children. There is even a scene where Vince Desiderio, the actual designer of the video game, is shown physically attacking Boll while shouting, "What the **** did you do to my game Postal?"
That'S good humour... ...and if the Naz... err investors give him money... ...why not.