Mischa Another idea could be to reward bunqers based on their total span of membership with an silver or gold card.
There should be a point rewarding system on the background which counts the duration of the membership and the activity on the account.
The latter should distinguish between users whom had bunq for a long time, but didn't do much with it (sleeper accounts) and active users whom use bunq as their main or second bank, obviously rewarding activity.
Cards should get an gold or silver backdrop on the coloured side of the card, which doesn't give them extra perks or benefits, but only acts as a status symbol for those hardcore bunqers.
On the other hand, what would this matter, as all bunqers are equal under the same subscription scheme.