This game is actually very interesting. Dream Pinball 3D came out shortly after, and managed only a few thousands of sales and was a complete disaster. In fact, that is how I would expect most pinball games to sell.
Pinball Hall of Fame, shows that there is a market for all kinds of games, provided they are done well.
There might not be room for 40 pinball games a year, but if it does as good as I predict, then who knows, the might just produce another game.