This means no sales, no themed merchandise, no decorations. December 25 and most other day are treated just like any other day for all stores malls, restaurants, ect.
You’d still get non religious holiday events like mothers days, or independence days.
What whould change?
well I first heard about it from my religious mother who got it from church. You may be right that there are capitalists stoking the fires but the religious leaders are more than happy to play their part.