It would be nice to have something like discounts on restaurants, entertainment, etc. For instance:
20% discount on Wednesdays for restaurants.
15% discount on cinema tickets on Mondays.
And so on. Maybe this could be for Premium users, as currently the Premium card is not that worth it (I have it).
I agree! 
And every sixth Sunday of the month, if this is not a public holiday in North Korea, lunch for free 
.
Haha, it is quite common for many debit and credit cards to offer this kind of promos. At least on many if cards I have, I had that kind of things.