No Offense, Maintech, but you are right.
I do not believe that the repair business is their main profit center.
If it was, they would not be focusing on hiring salespeople rather than fixit guys for their repair business. Nor would they be subbing out to some of these other groups for their repairs.
Simply put, Sears is being bled dry.
And on another note; Amazon is burning capital, NOT investing for market share.
There is a major difference there.
It'd be interesting to take a Sears on the mechanical side and experiment with it. Could you sell appliances, lawnmowers, exercise equipment, and tools via showroom and internet, and have small strip-mall size repair shops for the maintenance. Dump the dishes, clothes, and linens. I bet someone tries it.