

If you’re happy with how Apple Password works for you, I can recommend StrongBox. It keeps all data in a KeePass2 database and integrates into Apple’s AutoFill API. That means it feels almost native when using it. No browser plugin needed. (At least not for Safari.) And you can decide how you sync the database file.
Yes, maybe the seller dumped the cart and is still using it via emulation. Now, the buyer used the same cart with the same crypto key and Nintendo detected two uses at the same time.