Have you ever considered opening a special edition of Legends, without the gold-to-silver exchange market?
Yeah, I know, it's your main source of income. But, just as a special, time-limited edition. An experiment. All rules the same, just no exchange market. You'd still earn on plus accounts, gold club, and resource bonuses.
And maybe some bonus to silver from adventures, because with minimum bids like this, it'd end up with tons of no-bids auctions.