Since they're a private company, they don't have to be motivated solely by money, unlike most public corporations.

If they want to let their assets sit unused for 1/7 of the time, for whatever reason, no one can tell them otherwise.

It's not any different than someone refusing to buy an American car (or refusing to buy a foreign car), even when it would be financially advantageous to do so.

If you want to hate on the Cathy family for being conservative Christians, go right ahead. But at least you can't hate on them for being hypocrites.