I think CS left this forums a while ago because of the toxicity of BF in general. I remembered the rep tried posting on General Discussions and was flamed and ridiculed by the general passive-aggressive snarky people you see around there. They are generally more active on instagram nowadays. I've talked to them a few times via DM and the person managing their IG accounts seems nice and is willing to provide good informations.
For a folding knife to be corrosion free, they probably need to implement LC200N or other rust free steel not just on the blade, but also other components of the knife, including the stop pins, the lock bar, the lock spring and the clip. Even the hardwares are susceptible to rust. Any part that's rusted can affect the functioning & the tolerance of the knife. For example, the rusted lock bar may get stuck so the knife won't engage or close properly. I think it'll be pretty expensive to make the whole knife rust proof, i wonder if there's a big enough market to make this a worthwhile exercise..