I am still pretty looking at a reaction like Dick above. According to this, there is no mention of "abuse" or "commercial sharing".
iDIN works so that if you want, you can share certain information with an online party. BV a previously mentioned beverage store can ask you to verify your age. If that store implements it properly, it will only get your age when you authorize it via iDIN. iDIN therefore also puts privacy first!
In my opinion, it is very wise to put something like this with several parties (in this case banks), instead of with one public service. We know how great the government is with IT, so let's not demand even more here (and certainly not hear the "Blockchain" case I hear?). Banks already have these data, plus more money / people for computer security than the government ever dares to dream of.
It seems to me a good initiative, so I say: hup bunq ! If online bank is not something you can let go!