I am certain that the prime objective(s), of this space closure, is not at all to put some financial burden on India. Therefore, most of the discussion, carried out on this thread, to me, is off the point. I believe that Pakistan is demonstrating to the world at large that such unilateral aggressive actions by India against Pakistan would have implications, for others as well. Second aspect, of course is that, with this closure, the choices of modes of retaliation, in case of any future Indian aggression, are far more.