And criminal negligence voids any waiver.
So you are saying, that 2 billionaires, who didn't look into their dangerous journey indepently, are totally innocent?
They knew they were going on a dangerous journey, and signed the waiver.
No a customer (regardless of their net worth) cannot sign away liability for injury due to fraud or criminal negligence.
But since there are no deep pockets to seek compensation, it’s a moot point.
Nobody is going to sue anybody. But somebody might go to jail.
Does it matter? The two dead billionaires going to sue another fellow dead man?