Earlier quoted context omitted.
And in fact, it doesn't. http://www.google.com/policies/technologies/ "We don’t sell users’ personal information."
So, there’s a semantic trick here. Technically, when an AdSense client targets their ads only to North American users who expressed an interest in , Google didn’t “sell that user’s personal information,” but… whomever is on the other side of that ad, once clicked — and their partners — have just paid Google to find a user who likely has . Isn’t that selling personal information? Actually, if not legally?
> Isn’t that selling personal information? Actually, if not legally?
No. Its selling the service of advertising to people for whom some fact holds.
The rest is assumption on the part of the party purchasing the advertising based on the fact of that purchase and behavior in response to the advertising. The response to the advertising is what provides personal information, just as it is in the case of nontargetted advertising in offline media where the advertising includes a call to action which is directed (through the content of the add rather than user-specific targeting) to people for whom certain facts hold.
Unless you are going to argue that everyone who sells advertising space to people who include a call to action that involves a response to the party purchasing the advertising is "selling personal information" since they are selling advertisers a mechanism by which a message to can be sent to which the response can be used to deduce personal information, then, no, what Google is doing isn't selling personal information.