Oscar-payment specialist Or that you get 20 sandwiches every week for all your colleagues, that is of course still possible;)
Xander If they can access my bank details then they probably don't even have to estimate much. My address is also in bunq . Only if you have several properties may be different, but of course most people in the Netherlands don't have that at all.
I do understand that if you collect data from many companies, you can tell a lot more about a person than if you are just one company. That is why it is not nice if bunq shares all sorts of data with other companies, because they may be able to combine that. That's why I don't like companies like Facebook that want to collect all kinds of data from customers themselves.
It is also very easy to make mistakes, there have been companies that have made their data anonymous, but with a few simple combinations, a great deal could be learned about specific people; especially if it was then combined with other data.
Or a German journalist / politician who visualized location data for a few days and who had already forgotten exactly where he had been but Google still knew it.