Subject: Re: BRK Organization After Buffett? An Opinion
If you’re in the bridal business, you had to pay to reach happily long time married adults.Today you can easily target every single 21-38 year old at a small fraction.

Yes, but at least there is a partially offsetting factor: the CPM is different.
Decently targeted ads might cost you (say) 35 times as much per impression as untargeted, and much more for certain things like "people searching for mesothelioma". A lot of the market for mostly untargeted advertising is still there, it's just not doing very well. And of course, even a modest fall in revenues is enough to kill a lot of business models.

Jim

(made my money starting a company to do internet ad targeting...)