Assuming author's definition no, it can't be "fixed". Advertisements never benefit the consumer. Reviews, user comments/ratings, search results and goto sites

Assuming author's definition no, it can't be "fixed". Advertisements never benefit the consumer. Reviews, user comments/ratings, search results and goto sites (like craigslist) are the forms of marketing that benefit consumer. I don't consider any of those advertisements. (I think author considered craigslist classifieds as advertising.)