Commercial or not commercial on cars, suvs or even pick-up are defined by the "USE", not by appearance.
I can give your car a free paint job, in exchange, " Painted FREE by:
www.painturcarfree.com " across the back window, doesn't make your car a commercial vehicle.
Prowrap, not wrapping you shop vehicle, it is still commercial if it is used for delivery or other shop duty, unless it is just for commuting.
That was what OP's ideas, those employees are not using their vehicles for shop duties. With a special paint job (wrap), with
www.wrap4free.com on the back window.