Assume for a moment he has no interest in the money and in distributing FFF beers any more widely than they are now. I can think of at least 3 reasons why he might want to take this step. It might be a whim. It might be to have an excuse to get away from home for a while. It might be to have a chance to explore aspects of brewing he's not followed before though interactive work with another top flight brewer who pushes the envelope.