Goobbue Mount

[Decoyninja]

It's not a slippery slope argument, a slippery slope argument would be that SE would need to give in on the Goobbue before the complainers would request the rest...

A slippery-slope argument is when someone proposes that conceding to A would inevitably lead way to B. It's the idea that bringing back the goobbue will be like a domino effect that cannot stop, that the decs are incapable of bringing it back without bringing back things like legacy status for example. This is a silly view.

An example of this fallacy in action: your post #41.
“If they can't trust that this will be one-time only, how about legacy benefits, could we then trust that they won't be given away again?”

What about the seasonal items?
...
I see Goobbue as a reward from a seasonal event.

A "seasonal event" implies the event repeats on a cycle (like seasons themselves). Exclusive items are handled in many games this way actually.