The following announcement was made on the official Facebook page just a few hours ago:

Only one day left to get a new FREE outfit for Grampa and exclusive storyline that ties into tonight’s episode of The Simpsons, 8/7c on FOX.

So, sometime on Monday, Gorgeous Grampa and the Gorgeous Grampa Billboard will no longer be available. If you already have the Gorgeous Grampa costume or if you’re holding it in your inventory until you unlock Grampa, it’s yours to keep. And if you want the Gorgeous Grampa Billboard, you’d better buy it quickly.

So, Gorgeous Grampa will be gone within the next 24 hours. Whether that means another update is coming earlier in the week rather than later, we’ll just have to wait and see. A permanent harp fix would be good, too!