One of the reason why we keep seeing gamblers abusing casinos terms of service is due to benefits like free, high bonuses and contest. If some gamblers can stay off being greedy, it will help casinos to spend time and money on something useful.
Gamblers gamble, and most of them don't have any serious problems. All gamblers are more or less driven by greed... a deep desire for more, which makes it hard to stop when we should. So it's not gamblers who abuse casinos and break the Terms of Service... that's what scammers do. And there will always be scammers, which is why casinos have to spend money on all kinds of protections to prevent fraud and ensure fair conditions for real players.