Think of the cost to run the place, the people behind the desks etc, people like receptionists don't bring in money, they are a cost on a business although they are essential.
People still need paying even when cars are not being bought or serviced etc.
Supposedly stratstone are on their last legs, a year or so ago, they were worth 900 million i think then things went tits up and now they are possibly going under, they have just closed a landrover dealership round the corner from me and the aston/jag one down the road is possibly going the same way.
When i took mine in a while ago all they had in was warranty work and factory recalls.