there could be other reasons as well, maybe its too expensive to get listed on cmc, maybe cgcx has already applied for listing, maybe they need a certain period of over 10k volume, ...
As i know listing to coinmarketcap is free. They added every token or coin whic have more than 10k usd daily volume. And This project raised a huge money.
Maybe they need to be traded on other platforms as well, i dont know. Truthfully, it doesnt matter for now, once the bull market picks up im sure itll get listed