Stern is probably building huge cash reserves right now to make it through the next downturn and hopes to emerge as "The only pinball manufukuturer in the world" again....
or if someone else starts to gain market share on them, those cash reserves could be deployed to blow the industry away with dream pins!!
or maybe he's just old, doesn't give a shit, and wants to run Stern pinball into the ground simply for the fun of kicking back, legs crossed on desk, in his highback leather bound exec. chair with a stiff drink laughing at all of us crying about it on pinside every night...