Honestly, the eSports  are very popular today and many Game companies have made profits by selling skins or points.However, as a Counter-Strike and Dota2 fan, I care much about the Teamwork or personal skill during the games, rather then the skins. So, i don't think there will be large market in these games for competition. BTW, the FirstBlood.io has proven to be a successful project since it focus on the competition between players in my opinion.