I'm new but have not seen it yet but what about a 1 day calender. Keys regenerate at 1 per hour. This will keep players playing for the entire day as well as using or buying UN credits thus increasing Kano's profit. The 1 day reward could be an item that has either an Attack or Defense that is over 300. I play Zombie Slayer on Kongregate FYI.
Put this in idea section I'd gladly vote it a 1. That would be 21 hrs online straight for those who choose not to buy keys.
I think if read into why he would even want this is he buy's weapons thus giving him a weapon with coin and exp at a discount. IMO LOL
Damn, guys, its not that bad of an Idea. lol No one says it HAS to be a Full Calender. Maybe It Can be a New Game That lasts One day Each Month. Im Open to the Idea. My account runs almost all day so It would be nice to get rewarded for my waste of life lol