It probably isn't, but generally their ToS says you're not allowed to be in the US when you sign up, and they don't operate in the US. So you'd have to go sue t

It probably isn't, but generally their ToS says you're not allowed to be in the US when you sign up, and they don't operate in the US. So you'd have to go sue them in the jurisdiction of whatever island nation they're operating in (or get the authorities there to care). Additionally, if you're within the majority of people who deposit money and lose it all you're not going to even know this unless you do some active research about the casino.