I hate to be cynical, but I think the reason why online advertisers keep harping on about the "benefits" of personalized ads is that it justifies their existenc

I hate to be cynical, but I think the reason why online advertisers keep harping on about the "benefits" of personalized ads is that it justifies their existence. They can keep trying to sell whiz-bang audience profiling and attribution technology, even if it doesn't work all that well. Contextual advertising, on the other hand, is simple. It shifts the focus away from technology and toward people: recognizing your audience and crafting a message to them, instead of trying to have a computer do it for you. It's old-fashioned marketing.