An economy in a game like this is purely imaginary. Buying things won't "stimulate the economy" this isn't America. What you're talking about is the real world economy behind the game. Either way someone will have to get the gralats to make the trade. Whether it's one side or the other doesn't really matter. The packs will be purchased and the gralats traded to another person who will eventually use them or trade them to another person who will eventually use them or trade them to another person blahblahblah etc.