How does increasing you storage promote anything besides more... Stuff? The incentive to sell with reserves at 100bill would be the same as the incentive to sell with reserves at 1trill.
(just an example btw)
And to go off of MastaKilla`s point, if we lose the ALREADY LOW player count we have, what good will that do us? I remember when Omegian blew up the server a certain food producer restarted. Food shot up. I couldn`t count how many Virals were in VM. No turns leads to less activity.
As for the black market idea, correct me if I`m wrong here, but, and this is going off the assumption that we are addressing minerals here, wouldn`t adding a feature like that lower the want (or need) to sell on the real market? The product sells, they make money, but then others have to pay even more money that NOBODY will ever see again for the same stuff you could`ve sold on the market. Tax miners kinda exempt from that statement but I`m sure you understand what I mean.