Part of the article that I find interesting is
Poloniex is one that has offered zero-fee trading until the end of the year but it remains to be seen yet if it will continue the practice into 2020.
I hope they can continue to do and make it a permanent feature of the exchange, but I have doubt if those industry leaders in exchange will follow suit, because the hacking is a huge issue, and they are securing traders funds in case of a breach.