> I have trouble reconciling 'privacy' and 'you can buy it'. I'm not sure, but I would assume that the idea is that data from Adwords, etc. is more anonymised

> I have trouble reconciling 'privacy' and 'you can buy it'. I'm not sure, but I would assume that the idea is that data from Adwords, etc. is more anonymised. You can't build a system that tracks peoples searches across visits (using cookies).