One of the reasons why such games are yet to available in this crypto gambling industry is that it is hard to impement provably fair system on such games while we all know that provably fair is a must in this crypto gambling industry.
Provably fairness is required when we are gambling against the system! When it is a skill based game and one person is gambling with another person, why is it required?
This kind of games just requires a strong anti cheat system which can detect and block bots! Need a system that ensures that a human is playing against another human and not a robot!
The other reason could be related to "earning" for the owner. Such game requires owner to build a great website which may cost a lot of money but the owner will be hard to earn as it will be based on small fee.
Owner will have to take a small percentage based fees based on the gambling amount. I understand the fees will be small but if you compare the popularity of such games, a small fee can fetch a great amount of profit. To get an understanding of the popularity, see the number of downloads of 8 ball pool game in Google playstore. If we can manage to get 10% of this number, it won't take time to become a million dollar business!
Also it is hard to manage a pvp based game as it costs a lot of money for promotions to gain traffic. I still doubt that you'll see such game in the near future in this crypto gambling industry.
Nope! Then how come these games are managed to stay afloat without having any gambling elements to it? They even have millions of free players who didn't ever buy anything from them! Still they manage to make huge profit. Gambling business is changing for better and I am sure I will see similar games in crypto platforms in very near future!