This is a valid point; assuming the truck was free (well, the 4Runner, their 2nd gen Tacoma was before they got "big"), and I would venture to say that the vast majority of the parts on it were free, or very nearly free given the amount of exposure they get.
To follow this logic, whatever vehicle(s) are replacing this one (I'm going to take a guess and say a TRD Pro Sequoia will be one of them) will most likely be given to them at no or minimal cost, as will the parts being equipped onto them; thus any fund recouped from selling the previous vehicle(s) are essentially pure profit