I don't think its about money its more about people having the time no one is gonna sit at their shop 24 hours a day IRL are they ?
Also people can use the market stalls yet look at how unsuccessful they were what is gonna make shops any different if they change when even the market stalls aren't used?
The fact that market stalls are such a good addition yet not used by almost anyone trying to start a bussiness just means that people won't do it.
I am of the opinion that forcing people to do certain things is not the way to go if people wanted to open up a restaurant or sit at a shop for 24 hours waiting to see who comes by they can already do that yet they don't do it and even the ones that don't have the businesses don't do it either with the tools that are already in the server like the Tray at most restaurants.
Also it isn't 100% true that shops don't roleplay i don't know about others but i buy alot of Fruit, Plastic, Drills from Trucking Companies or someone that is looking to make a name for themselves, Sponsor Events, ETC...
My point being forcing is not a good idea and might have the opposite effect, also kinda hard comparing NoPixel to RPUK considering that most of the people in NoPixel are there 24/7 or always have huge population at almost any times.