Once you start playing risk online you’ll quickly get tired of the very few maps most websites offer. They all just seem the same after a while. You’ll just thread on hoping, waiting for something new.
CC offers such a vast database in maps that you’ll never get tired of them(and they’re visually much better than warlight). Personally I’m the kind of player who prefers the unusual types of gameplays. They’re challenging and most of all they’re different. They offer nice variation and worthwhile learning curves. This is where CC excels the most, nowhere will you find so many both easy classical maps and complex atypical maps.