Does Square remove optional items from the shop?

[Dustytome]

Certain items WILL go away. Mainly event-related items, like the ones up now that have to do with the Moonfire Faire. Like the oriental windchime and firefly basket. They will come back next year, most likely, but won't be available until them.

In-game earned event items tend to disappear and then re-appear as mogstation items a year later, but I don't recall mogstation items ever disappearing even temporarily after they've been added.