Agreed, but this time Seraph's main game has already airdropped players a direct access pass and stalls, which is equivalent to free play.

Using an auction method will likely deter many people, leaving only those wealthy players, and it will ultimately become a game that only a small circle can play. However, if it is in a blind box format, it would be different; drawing would depend on personal luck, and the gambling mentality is probably easier to manage than the auction price inflation.