The model is irrelevant. The point is that, for the vast majority of the population, enough disparate pieces of personal data exist on the internet such that if it could all be conglomerated together, there are enough inter-related items to produce a single consistent profile.
You can't add to that set of available data and improve that situation. Any more data you add only makes the job of tieing it all together easier. It's not that extra info can be disseminated provided it's in a particular way, because there is no 'right' way any more. Computers are too powerful and the data is too pervasive. The only way to reduce the impact is to stop the flow of data out from organisations and the only way to do that is stop them sharing it
at all.
No organisation should be able to give personal data is has about you to any other organisation. Not for money, not for free. Not for research, not for profit. Not ever.
Jon