Really? To me it seems that "user-predictive" modeling just mean "show ads for sites user visited recently". E.g. if I buy a blender on Amazon (and maybe check

Really? To me it seems that "user-predictive" modeling just mean "show ads for sites user visited recently". E.g. if I buy a blender on Amazon (and maybe check a few comparison sites or something before that) I'm going to get blender-related ads. If that's the best advertisers can do, it's pretty weak sauce... Why would I need 7 blenders?