Jagex created party hats and discontinued them not because they wanted to create values for players. It is the players who created values out of the circumstances themselves.
OSRS also created unobtainable items like the tradeable cosmetics from Leagues, perhaps they even wanted to create values for some players. However, the players failed to create values out of them, regardless of whatever circumstances. It is not hard to fathom the lack of values of cosmetics in OSRS, when there is no direction for the entire game itself. Values of all items will vanish when the virtual world ceases to exist, so before any OSRS pixels to have any sustainable values, OSRS has to show its direction and demonstrate it will last a bit first.
03-May-2023 18:49:05