That is a question you should probably ask khal in private and not an open question on the board.
Being a smith here has nothing to do with the ability to get a CS
. Erv chooses his affiliates and it is not based on being a smith here (there are a few that are not).
He is not allowed to take "commissions" on this forum anyway because he is not an MC member or GUILD member. Those are the rules of this forum. I may be wrong but I do not think Khal has even applied to become a MC member either at least not recently. Again though even if he does pass and become an MC member it does not give him access to the CS. There are several MC members here that do not have access to the CS.
I hope that explains it for you.
I'm curious why Khal isn't one of the registered sabersmiths here yet. I'm thinking of asking if he will do some work for me in the future (being UK based) but he can't get access to Crystal Shard boards as a result.