You're right - it's not that simple. To take an anecdotal example. I was slightly interested in knowing why so many people now took credit cards. Not 'tradition

You're right - it's not that simple. To take an anecdotal example. I was slightly interested in knowing why so many people now took credit cards. Not 'traditional businesses in shops' - but food-carts/stalls, beggars - pretty much everybody. Tiny little calculator things I could tap my card/phone on. Even went so far as to work out which the best ones were, what rates were, reviews of the various companies - I was just interested. I then spent the next few months being bombarded with adverts for them from one company (the best provider, if I wanted this service). I just wished to could click to stop them showing me the advert - I DON'T WANT IT - please spend your limited money on selling to somebody who might. You're seemingly an awesome company and you're wasting your money. Or when I proposed. I worked out that a jewelry-maker usually just adds a fixed % to the costs to come up with the final price. I bought a 'modest' flawless diamond and then got my local jeweler to put it in a beautiful mount, for a fixed price. 6 f'in months over every page I looked at, being covered in diamonds. Each and every one of them wasting their money. Now in perfect data-mining-world, they'd have worked out I'd booked a wedding venue and a ring, so unlikely to need another ring. ...Actually, this gives me quite a good thought. All the tracking we have, is "one-way" - and it's hard to correct the f'ups. If we could maybe accept the tracking and learn to live with it, the trackers could be more upfront and ask us direct questions. Or at the very least have a "was this advert of interest to you" button. A/B test it obviously - as most people will say no to everything, but I'd be on board.