Re: Opt in rather than creep out
Some of that happens because the advertisers do not know if conversion has happened - maybe you're still looking.
Oddly, even the one you actually bought %product% from still pays to advertise it to you.
Some of it is just stupid, like Amazon's "Since you recently bought a satnav, perhaps you'd like a satnav?".
The properly foolish part of it is the timeouts seem to be really long. Many advertisers seem to keep banging on about some you looked at weeks ago, and it's pretty obvious that anything you haven't searched for in a few days is something that you either decided against or have already bought.