Personaly, I wouldn't share a received prize with gambling community. I think it's a better idea to donate portions of the money to people in need close to me who I know their realities, so I can see if they are using the donated money wisely for their personal growment, or if they are just wasting it on addictions or worthless stuff. There are many people seeking for an opportunity through a helping hand, so they can change their lives, and I think it's on this kind of people that we should to focus our efforts, instead of sponsoring addictive and irresponsible behaviors from individuals who can't manage their finances properly.
Not that these people shouldn't be helped and supported as well, but the approach must be different.
If you divide the winnings among the gaming community, they won't understand its worth, and some may even squander the money for more gambling rather than saving it for something worthwhile since they want to win too. Giving the money to those you believe need it—friends and family in particular—is the wiser course of action, as you mentioned. They'll even be grateful for what you've done for them. It's a fact that some people will spend their money on material goods, while others may spend it on things that have no real value. And their are people that they will so use the money well that when you see them you will be impressed with how they spent their money. And if we understand anybody life style we should know what they are capable of doing. So that you don't give and you them spending the money on drugs or something even worst you won't be happy at all.
No. This will only make gamblers feel that they will be helped to meet their living needs while they can still gamble as usual. They may be even more irresponsible in their gambling because they are calm to see that there is crowdfunding that will help them. But if crowdfunding is intended to help problem gamblers cure gambling addiction, for example, maybe crowdfunding can work well. Maybe there are still people who care about others, especially those who experience gambling addiction problems, so from crowdfunding, they can use the funds to help the healing process of people who are addicted to gambling.
Some of them might even perceive you as an incentive to gamble more, just to see whether they will follow suit. That's my constant issue with addicts. They see that nearly everything is motivating. And some of them even function, but they are not a clear solution. It is better to seek professional assistance as soon as it is determined that addiction is the issue. Their are addictions that are worst than gambling the best that can be done if any is noticed then they should recommend help for them. Because addictions like drugs are serious addictions that affect both the victims finance and health.