A lot of websites miss the nonce aspect. This in turn creates an unfair environment and a major opportunity to rig events. Unless the user changes their client seed EVERY round this case is not fair. They will also have to in turn engage users to verify bets one by one to ensure their fairness. This isn't what anyone (Lets be realistic) does and leaves the vast majority of people open to being scammed. If an operator notices you are not changing your client seed EVERY bet they are able to change the outcome of rolls.
I think it's a bit too harsh to call it "fake" provably fair, as without a nonce it is still provably fair -- just perhaps suboptimal from a users point of view. But if you trust the client (e.g. you've audited a static version, or using some 3rd party client you trust) it's actually possibly better.
"suboptimal from a users point" if you mean with users the players of a casino IMO the players should not need to trust any casino OP and need to be sure that they cant be cheated. if this kind of Provably Fair exists and if this is the "nonce" version it should be implemented by all casino OPs
a player who wins will in general not take his time to verify his bets after his gambling session but if a player loses he will yes try to verify his session
just my 2 satoshi
