I still can’t imagine someone could gamble with their hard-earned money. Having that kind of mindset is not strong-hearted, but it is foolishness. Perhaps we should always remember that gambling is supposed to be for fun and entertainment, not a way to grow our money because this is not an investment that we have to expect for such situation. Even if we say we are willing to take risks and accept losses but since we are talking about hard-earned money, we are already wrong. Otherwise, we better call ourselves irresponsible gamblers.
People gambling with their hard earned money is not foolishness, else, you did be foolish too for promoting a gambling casino through your signature ad.
The manner and approach at which people gamble is what makes them either foolish or wise, there are rules laid out for gamblers, those who follow this rules usually will enjoy gambling, but those who do not, usually will experience the bad side effect of neglecting the rules of gambling.
Gambling is supposed to be a fun venture as you have said, but then, we live in a world where every thing is being abused, most especially things and activities where it is possible for people to get profit from, and like it or not, it's what that have come to be and we must live with it.