Earlier quoted context omitted.
How do you even define "non-wasted ads"? One ad = one buy? One ad = one interested person? Targeted ads, even imperfectly-targeted ones, are "less wasted" than other kinds of ads. They are not perfect, by far (thankfully, if I may add so!), but "not good enough?" Come on, what exactly is good enough, then?
>Targeted ads, even imperfectly-targeted ones, are "less wasted" than other kinds of ads. How do you know that your 'targeting' is working? If you target females how do you measure how many females saw the ad? Targeted ads should go to the targeted audience or they likely went to waste - at least the advertiser didn't get what they paid for. The quality of your targeted audiences matters to your advertising customers…
Re: The relevance of IP addresses in the tracking ecosystem [pdf]
#61You get better conversion, in aggregate.