Mr. Subhadeep, is ur reply from ethical viewpoint or from the economic angle? In case of former, pl go to home page and see how many business ad are there? I have shared a piece of information just as the ad of gateforum to the student community. If it be from economic viewpoint, then what is the cost of such ad which may be borne. I presume that u are a student and not a teacher. Please try to understand that this information is only for the student community.