That's a good point. In the U.S., baseball has the most games, and so I think most cities are glad to have those stadiums. We're talking about 1/2 of a full schedule of 162 MLB games being played at one's home stadium. Compare that with NFL football, though, in which a full season is 16 games, maybe with a few more for pre-season and playoffs. From the perspective of a city, a stadium is really a big investment for that few home dates. Some venues also can be used to host concerts, etc.