if you go to each of those markets on Binance or even on Coinmarketcap you can see that these coins don't have enough volume to be considered profitable from the exchange's point of view.
for example if you change the time steps in the
https://coinmarketcap.com/currencies/bitshares/ page to 1 month you can see that excluding the recent dump of BTS, it was pretty much a dead market with little to no volume. and the recent dump is obviously caused by this news and people are panic selling this shitcoin to get rid of it prior to the delisting.
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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 .
Not everyone would really be all knowing on which means that there would be those people who would really be just simply be able to skip out on things on which they do really believe that it is really just that on that way without any valid reason or some sort. They do really just that simply trying out to make some questions instead on trying to look for those answers using up their own common sense but well asking in the community
wont really be that bad either but honestly if you do really just simply understand on how business works then you would be able to find out that it would be normal that these platforms would really be
removing into those projects who dont have volume and would be replacing for another one which does have tons. Making money is always been the main priority and it is really normal that
they would really be doing such step as a business then it would be a common approach.
Delisting and listing then it would really be just that an endless cycle because these platforms do need to make some revenue so it is really just that right that they
will really be putting up those kind of system for a certain duration period.