"""Theoretically speaking, isn't being targeted by advertising at absolute efficiency being given exactly what you want when you want it?"""<p>That sounds an awful like going to a webpage, for example Google, typing in a query, and having the results be appropriate and useful.<p>(Roughly, how Google was before it stopped being that and started serving useless shit like dozens of the same mailing list mirrors, shareware download sites and shopping aggregate sites).<p>"""Theoretically speaking, isn't being targeted by advertising at absolute efficiency being given exactly what you want when you want it?"""<p>No, because part of the point of advertising is to convince you that you want it. Perfect advertising would be such that whatever they show you, you buy.