There have evidently been some unethical practices by some of these exchanges over the years, like padding volumes to make it look like they do more trade than they actually do.
Note that DooMAD is an anti-Bitcoin troll account, padding out his credibility here with 1 post in 1000 that isn't perpetrating a divide & conquer strategy against Bitcoiners, which is what DooMAD normally does with it's posts.