Goobbue Mount

[Decoyninja]

Players were promised something would be exclusive and limited time only.

When the devs list a timetable for when the mount stops being attainable, it is not a promise that such items will never return.

The word "exclusive" just means that it is limited in some way. Time cards are EU/JP exclusive at the moment. It is not uncommon for exclusive retailer preorder bonuses to be attainable years later. Many games use repeating holiday events to distribute exclusive items. The Coeurl is an exclusive mount for CE/DCE, but it isn't going anywhere.

Of course that is all moot. I don't have to even argue the different definitions of “exclusive” because the term exclusive is one you are other posters here are applying to the mount, not something you were promised.
To propose that this item was PROMISED to never be available again requires sourcing. Dev posts stating when the event ends is not good enough.