Why are some Dungeon Minions and EW Bicolor Orchestrion Rolls still Market Prohibited

[RokkuEkkusu]

well 3 unsellable minions in EW have massive spoilers in the description thats why.

The minions from the level 87 and 90 dungeons are indeed spoiler worthy. However, do elaborate how the unsellable "Tiny Troll" minion from the level 89 dungeon being more spoiler worthy than something like the selllable "Optimus Omicron" from one of the level 90 end game dungeons. Because now we're going into a territory where such reasoning no longer makes sense if we're going by that logic.