Idk, maybe it's all scam, maybe not. It's not a big deal as long as people invest what they afford to lose.
I have 95000khs, I'm keeping them cause I don't care if the site go down forever. There are some chances the site will turn on again and i will continue earning (not much, but it's just fun).
You can't blame people playing in gambling, it's just a game, and people enjoy the game.