You can craft classes, costumes and a lot of other rare now with the materials you get from lootcollecting those non tradable mounts.
They also made chaos chest a lot more accessible to the majority of the playerbase because they can now drop from almost anything while playing the game.
Only some of the chaos chest drops may be untradable.
Not every mounts. I repeat, only from chaos chest drops. If it can be dropped by the chaos chest doesnt mean the mount is actually untradable, but you can still achieve/gain/get the mount by getting them another way instead of depending on chaos chest tho.
Also threatening something or you want to abandon the game is not a nice thing to say.
Not like it influences us that much if you abandon :/