In Malaysia and Thailand some BK and McDonald's deliver. But then again, I don't know if it's up to them to decide or if it's being done because of the competitive environment. You can basically find great food at almost any given time within walking distance.
There's the competitive aspect in economies where street-food is the norm but then keep in mind that it's dirt cheap to deliver there. In Thailand a delivery worker earns 220 USD a month.
