Even in the China server, there are many coins and bucks CDK can be redeemed repeatedly.
And many money trading skins can also be seen here, but the official doesn’t seem to care much.
This is why even though it is known that 1/6 to 1/8 exclusive skins can be purchased in the store with cookies.
There are still many people who are willing to spend money with those bad guys to buy exclusive skin CDK.