What exactly is weird? This is a perfectly valid concept - a multiplayer game where not one but 2 out of 3 players win money! The site just gets a percentage of the whole sum. The game is really easy to learn. We also invested a lot of time in making the game fair so that cheaters don't have a chance - e.g. with disconnects in crucial moments.

Regarding the fairness - if you had given it some thoughts you would knew that implementing provably fairness in a multiplayer game is next to impossible - namely due to the fact, that multiple players are involved. Even when implemented there are many more possible attacks available than in a singleplayer scenario.

And remember that the site just get a commission from the games played - no easy way to cheat because you are playing against other players, not against the game.