People are acting like this is a relic of the past, and I'm surprised you're surprised. I live in a small-medium-sized Canadian town at the edge of the GTHA (not the hub of economic activity, but not exactly the boonies) and many shops are still closed on Sundays. To the extreme even—many only open for short hours (4-8) during the weekdays and a half-day Saturday. It's a relatively quiet place. We've wondered how some can stay in business. Given the area, our guess is wealthy families backing them. I don't think massive profit is their primary motivator, just involvement in the community. And social influence, I'm sure.