According to me,If advertisement done in proper effective way it is not wasteful,and for that you must search for highly professional advertising web agency for good outcome.
Most Advertising is Wasteful which is not real.
It works both ways and depends on the initial purpose of the advert-informative of persuasive. Normally, large scale adverts are very profitable, they exploit the marketing Economies to the fullest, spend hefty sums for big returns.