[sirspacey]

Having worked with ad networks, publishers, and advertisers, it’s incredibly clear that ad targeting is barely this intelligent.

But the serendipity it can create is truly wild.

[majormajor]

There's nothing particularly "intelligent" in any of the stuff I described - "see common device/profile/IP/whatever, make link."

Tracking is easy, intelligent personalization is hard. But tracking alone takes a lot of constant investment with tech development and arms race and all.