Sounds like nonsense. However, if they're generating client-seeds on the server, they should move the generation to the client (and only after the server has sent the client the server-seed-hash). As the name suggests, client seeds are best generated by the client.
But regardless you can avoid all the risks by setting your own client seed, which you should be doing anyway. Or even better, if you really think they've found certain server seed + client seed such that it's distribution is "favorable" for the house, that means it would be exploitable and you could take advantage of them. e.g. If the server wanted seeds that made 2x bets lose, unless they knew which direction you were betting they would have to brute force a combination that had a higher distribution of outcomes between 49.5 and 50.5. However that would be vulnerable to someone who was betting 1.96x to take advantage of that. Or if they found a seed combination that had a higher distribution of lows, you could instead bet high. etc. There's no way you could use that to cheat players, without subjecting yourself to a similar amount of risk, which no casino is going to want to do.
My guess though, is you're that lame extortionist that wants money to stop saying nonsense? If so, you should realize that no business is ever going to pay you, no matter how much trouble you cause if for no other reason then they would be opening themselves up to more dipshits
But regardless you can avoid all the risks by setting your own client seed, which you should be doing anyway. Or even better, if you really think they've found certain server seed + client seed such that it's distribution is "favorable" for the house, that means it would be exploitable and you could take advantage of them. e.g. If the server wanted seeds that made 2x bets lose, unless they knew which direction you were betting they would have to brute force a combination that had a higher distribution of outcomes between 49.5 and 50.5. However that would be vulnerable to someone who was betting 1.96x to take advantage of that. Or if they found a seed combination that had a higher distribution of lows, you could instead bet high. etc. There's no way you could use that to cheat players, without subjecting yourself to a similar amount of risk, which no casino is going to want to do.
My guess though, is you're that lame extortionist that wants money to stop saying nonsense? If so, you should realize that no business is ever going to pay you, no matter how much trouble you cause if for no other reason then they would be opening themselves up to more dipshits