Sooo, this is something that we have but that not others have, we actually have a card collection system. Basically, it's like collecting pokemon cards but for your fav groups. You can check out the current available cards here:
Cards | Kpopsource - International kpop forum community.
You can request those once every day as long as you complete the daily quest! However, there's more! There's different types of cards, such as common cards, rare cards, and legendary cards. Common and rare cards can be gotten by completing the daily and weekly question, but legendary cards can only be won with the card raffle.
I would check out this thread if you are interested in collecting:
A Complete Guide to the Trading Card Game - Kpopsource - International kpop forum community.