There is a reason why skill based games were not under the radar of gambling site owner's interest because they will lose their profits if people can use their skill and win a game.
Probability based games will be the choice of gambling sites so gamblers have to live with that.
The Casino won't lose profit if they let players compete with each other and take a commission on every game.
So always win situation for the gambling site.Then I don't think much people will get interest in this kind of gambling even if they are they lose interest after playing 10 or 100 games but this will never happen with casino games.