Frictionless my - ooh look! A kitten! You like kittens don't you?
What the marketing dorks don't seem to realise is that the problem with all this targeted stuff is that it actually reduces the chances of me buying something from you. If I go to your site just to have a look around, to see what you sell, and to see if anything you do is in any way interesting to me, and all I see are adverts for irons or toasters, because that was what I searched for (and maybe bought) on the last site, then I will think you are just another site flogging irons and toasters and go away none the wiser as to what other interesting stuff you may have, and that I may wish to buy. I'll go to a site that doesn't pester me, and find it there. It feels like they have perfected "Just Too Late" advertising.
Hint: I know how to search for myself thank you, just make your website easy to navigate and quit with the animated crap floating down the screen or scrolling past in a carousel with simulated inertia.