The intent was not to replace cash purchases, just to add an additional avenue of purchasing. I never ment to bankrupt Midoki by removing their source of revenue. But with that said, after all of the available upgrades have been reached Gold has no value except to challenge and that leaves a lot left over. Also a player capable of amassing great wealth through plundering should be given an opportunity to rewards other than resources he no longer needs in large quantity and could go towards purchasing gems. Gems are always in demand for leaderboard pushes and now for guild Rumbles, this option would be greatly welcomed by some players.