The designer badge is obtainable by getting 1 item in-game.
Epic Designer Badge
The epic designer badge is obtainable by getting 5 sets in-game.
There is voting channel in Discord called #vote where people can vote whether they like the skins or not. There is also a voting system in-game where you can rate skins from 1 to 5. If the skin gets 3,9/5 or more, it will become a clan quest award. If the skin gets 4,2/5, it will become a Special Offer.