Too good to be true offers and promos are actually an obvious trap but unfortunately there are still gamblers that fall to that kind of advertisements. I personally fall for this I think when I was just a newbie to online gambling. Though this happened mostly online but there are still incidents of it getting used on gambling booth though it's legit like the lottery but yeah odds of winning is like 1%. Online gambling uses all the eye catching techniques that fools us and yet some of us still fall for this trap.