The funny thing of the story is that guy celebrated his win by salat because he is religious and a muslim, the problem is islam forbids betting or gambling on anyway (strict rules in islam) just like ignoring that and doing something bad in islams principes. Anyway this guy is really lucky to win such a prise with a very small amount he risked, its a very good odd though and also im wondering which game did he play or bet on
Maybe he is praying to be grateful for his big win in getting a lot of money. And even though he already knows that gambling is forbidden in Islam, maybe he doesn't think he can win the bet so he places the bet to have fun. But in the end, this guy won and was indeed very lucky. And hopefully, he doesn't try to gamble again because of the strict prohibition in his religion. And surely now he could buy what he wanted with that winning money.