Hello Rigal,
Codes could be redeemable, but they were leaked on the internet and should not be sold. We don’t need evidence to know these codes were leaked.
Also, these codes are for “random loot”, which is forbidden on Gameflip (misleading listings as well, since it says Minty Pickaxe).
If you tell me your invite code, I could check on your account and see if any Minty listing can be refunded to the buyers (as well as the one you’ve purchased).