These days the world cup match is playing like a raging fire. I am not a fan of football game, but I still saw many matchs even in the midnight. What I see is for fan, but I know many people not just to see the match, but to enjoy the bet of the games, actually most of them lose their money in playing it.
I think the football gambling is like stock market in China, some matchs result have controled by gaming company, they make the rules, and set many ways to win the money from gambler. Although some gambler win several times, but if they deep fall into it, they will lost a lot in future.
So I will never try and join in football gambling, I see the match is simple, enjoy the game.