This is what I’ve been told:
“Unlike permanent in-app offers, such as the individual Gems packs and Passes packs, which are available to all users at all times, special offers, such as the Unlimited Passes and Ad-Free bundle, are non-permanent offers and are sent to random groups of players by the system in limited quantities for a limited time. If this special offer is not available in your app, unfortunately, there is nothing we can do to manually add it to your in-app store for purchase. Unfortunately, this means we can not confirm when this special offer will return to your app. Special offers will always be a part of Episode, but please be advised that special offers can change at any time.”
We do appreciate your feedback regarding the availability of this special offer and your feedback has been forwarded to the team. 
