I've seen this article for a long time and every year there are articles about the fake volume of exchanges.
This is a bad action and it really does not cause a positive impact for traders. but we must also know that our crypto market still has a small market capitalization and we cannot demand high liquidity.
I think a good trader dont need to take a look at volume graph in these sites!
He will take a look at last transactions before choose the exchange to operate. But, everyone who trade for some time know exactly all the good exchanges!
Traders just search for a new one when have a new token/altcoin