Advertising ought to be on demand, really. So you might say "I want to do x, what are my options?" and then you'd receive a bunch of relevant ads.
Having it pushed at you all the time regardless of what you intend to do just puts you off doing anything at all except tell everyone to piss off and leave you alone.
I should just be able to say "I want to eat a Dundee biscuit" and receive a range of offers of delicious Dundee biscuits.
But no, constant chaos and NO DUNDEE BISCUITS AT ALL.