Purchasing. The redemption code is directly bought by credit card in Nintendo official website, so that after you buy the black card game, your account-redemption code-order-credit card transaction chain is in Nintendo's hands, and he can take measures. Daigou is sold by third-party sellers, who buy in large quantities from Lao Ren and then sell them. This is a problem between the merchant account and Nintendo. He can't let Nintendo know exactly which activation code was purchased by a black card, so Nintendo can't do anything about the recharged account.