You've just given a direct answer because I see no reason why a gambling company will not be penalized for unfair activities to a gambler when the gambler didn't go against the rules of the gambling site or go against their terms of service because since gambling is legalize in most countries it then means that the government can also intervene if there is any form of manipulation in the system except it involves an illegal gambling site. Gambling with a legal site should also be taken into consideration for every gambler so that if there is any form of intimidation against the gambler, he can file a lawsuit against that gambling company.
Even though some gambling sites this days are becoming fraudulent but they can only succeed on someone who doesn't know a way to seek justice and not for someone who understands the law and can afford a lawyer who can solicit for the gambler but it's unfortunate that most gamblers don't want to hire a lawyer maybe due to the processes, time and money it will take to follow up such a case but they don't think of what they will stand to gain if they win the case against such casino company. Another thing is that a lot of gamblers doesn't have the money to also hire a lawyer who will intercede on their behalf.