I received the impression that being closed on Sundays was part of corporate culture, a statement of valuing something other than maximizing value extraction. A poster here commented that the franchise agreements were unique in the poster's experience in having a flavor of partnership. Customer service seems to be emphasized.

B&H Photo seems to have a similar (even greater?) customer service drive. More than one poster here has commented that being closed on Jewish holy days (including Shabbat) is not a major deterrent given the quality of customer service and products.

Keeping one's word even when it hurts is a mark of virtue and integrity means such virtue is expressed in a breadth of life activity. Miracle on 34th Street hints on the advantage of "having a heart", even if Mr. Macy saw it as a corporate gimmick.

A McDonalds being closed one day a week because the managers like outdoor activities that day (or to try to achieve a Chick-fil-A effect) would see the ethos behind that behavior informing other behaviors.

Marketing can support a false reputation, but trust is important to social function. Betrayed (or mistaken if you are Roj Blake) trust wounds society.