We the customers purchased the keys from Fanatical.
It is with them that we have a contract.
It is they that are in breach of said contract.

Forum posts made by those claiming responsibility for the revocation, and offering replacement keys should IMHO be entirely ignored as they aren't a party to the original contract.

Also, this is a really ♥♥♥♥ move developers.
Publishers, retailers & customers aren't going to want to touch you now.