A friend who has friends who played (n some of them still plays) this game told me that many of them stopped play this game because there are sharp differences between premiun n non premium players/account. unfair. The most thing that they think unfair is non premium players/account have no access to Auction, and that hurts alot.
my suggestion is, if u want to listen it, make non premium accounts have access to auction.
i know, it should be different traits between them. u could differentiate them with (not to much) effects in game, but, u know, auction have to much effects in game.
I believe and currently feel its true (what my friend told me), n starts feel not interesting to continue playing this game.