Coulson came up with the "expert market" to try and ease the stigma of the greys. But KKUR did nothing to be "elevated" to that tier. Now, the majority of tickers that were on the greys are on the expert market.
And not one broker recognizes a difference one from the other. The only thing that does matter to them is whether it's labeled Caveat Emptor. Which KKUR is.