There’s an updated article that includes GOG’s follow-up to that situation: https://www.eurogamer.net/gog-pulls-hitman-from-its-own-store-admits-it-shouldnt-have-released-it-in-its-current-form

Dear Community,

Thank you for your patience and for giving us the time to investigate the release of HITMAN GOTY on GOG. As promised, we’re getting back to you with updates.

We're still in dialogue with IO Interactive about this release. Today we have removed HITMAN GOTY from GOG’s catalog – we shouldn’t have released it in its current form, as you’ve pointed out.

We’d like to apologise for the confusion and anger generated by this situation. We’ve let you down and we’d like to thank you for bringing this topic to us – while it was honest to the bone, it shows how passionate you are towards GOG.

We appreciate your feedback and will continue our efforts to improve our communication with you.