On 12/07/2011 09:25 AM, Warp wrote:

>    The vast majority of ads come from external URLs. Only an extremely
> small minority of ads originate from the same server as the page you are
> looking at. The reason for this is that advertisers pay people to put
> their ads on their websites, and these ads need to change frequently to
> be effective. Hence these websites link to the advertiser's servers to
> display the ads. Thus it's enough to blacklist the URLs pointing to the
> ad-producing directories in the advertisers' servers.
>
>    The advertisers can't change the URLs because it would break the millions
> of websites which show those ads. Hence blacklisting is quite effective.
>
>    Of course *new* ad servers and directories inside those servers pop up
> all the time, but that's why the blacklists are updated.

So, in essence, your argument is that the majority of ads come from a 
small number of static servers?

Certainly I could easily believe that most of the more unknown 
ad-encrusted sites are just being paid to link to somebody else's 
adverts. But if I went to somewhere like a big movie studio, I would 
imagine all the ads on their site probably come from the same server as 
the actual content. (Then again, if you go to a website which exists 
solely to advertise a company's product... the adverts *are* the 
content, in a sense.)

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