Unfortunately people seem to be paying a lot of attention to this indicator, and if a lot of people pay attention to an indicator, it eventually becomes a relevant one because behind a lot of people there is a lot of money.
I noticed that with CMC's exchange volumes lately. It seems that exchanges are desperately looking to artificially inflate their volumes to occupy a higher CMC rank in an attempt to attract more users.
If you look at the traffic stats of the more popular exchanges, then you'll see that in most cases CMC is the second after Google when it comes to exchange linking. In case of OKEx and Huobi, wich are the most manipulative exchanges when it comes to volumes, CMC is even the main traffic provider, which pretty much explains why they are trying to keep their volumes as high as they have it right now. In other words, CMC has more power than most people here think.