I don't know, the restaurants I suspect of laundering money around me don't bother faking customers. They are just empty most of the time.
Maybe they noticed that those adresses never cause problems (single old people) and are close enough to not be too annoying to deliver to?
Maybe they are just too lazy to do more, and it's enough for it to work?
Maybe they are using a lot more addresses but we don't get that information? But there is a limit to the addresses you can use, and you are supposed to have repeated customers.
Maybe there is something special about those adresses we don't know about?
Maybe they noticed that those adresses never cause problems (single old people) and are close enough to not be too annoying to deliver to?
Maybe they are just too lazy to do more, and it's enough for it to work?
Maybe they are using a lot more addresses but we don't get that information? But there is a limit to the addresses you can use, and you are supposed to have repeated customers.
Maybe there is something special about those adresses we don't know about?