If the former, it is not exactly a vote of confidence in DSA. Last time I was there there were not many shops, are any left? Is the bar still open?
bb
The shops open and close to suit the flight schedules, check-in opening etc.
Landside: There is a WHSmith that is open most times during the day and to suit flight departures during the evenings. There is also a Costa Coffee which again is open early morning to evening, or to suit flight departures.
Airside: There is a WHSmith, Costa Coffee, Alpha Retail (Duty Free), and a Wetherspoons bar also serving hot and cold meals. The bar will always remains open while passengers are in the departure lounge. I believe it is an airport contract and perhaps some sort of health and safety thing too, as obviously the main source of drinks and refreshments after security.