Even thou they may have made a huge loss on the development of the car VW now know how to build the worlds fastest car with things like

How to build a 1000bhp engine and make it reliable
How to make a gearbox to cope with 1000bhp and make it reliable
How to make a car that dont take off at 250mph (materials, stresses, areodynamics ect)

and a few other things on top of that put VW one of the most if not THE most technically advanced companies in the market.

They are going to be using the things they have learned from building the Veryon for the forseeable future.

At least untill another company take up building the fastest car ever.

Besides if indicator stalks are 4.5k each, imagine what the servicing bill on one of them is Most cars are made and sold at a loss these days, but the real money is in servicing and spair parts. I'm pretty sure they will make some of the money back on servicing and the R&D for new cars they wont have to do.