It's not scam you just lose money and that's how gambling work. Don't gambling, it's very risky, when you win you will feel how easy to make money and that make it for some people became addicted to gamble.
I agree gambling game is not a scam. It is a changce/ luck game that offers you an earning. But the problem is the addiction in it that brings alot of problem to that person and its family. It has been proved that gambling addiction result to problem gambling. Which I think should be control before it control you.