I don't know why OP seems to not understand this system of Exchange ? that they have the rights to delists whatever coins/tokens they think or seen to not worth being in their exchange.
as they are given notice before the delisting so nothing they can do , though they can always file for listing again just prove the exchange that they are worth being listed .
I also feel surprised that the OP doesn't understand the market, even though the OP himself or anyone else can see examples of things like that nearby or around him by looking at market owners who don't put unsold goods into their sales stalls. Because it will only take up space and keep your money from circulating and you will have to throw it away when it is rotten.
Likewise with the conditions in the crypto market where market owners have very naturally removed coins and tokens that are not selling or have died without any interest on the market list. Because this does not benefit the market owner at all and only makes it a useless collection of rubbish in the market, it is clear that this does not need to be understood in a complicated way because it is what the market should do.