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Shops cost money, right?
Where are the new players supposed to get that money. Oh right, from shops.
But wait, players go to /warp mall just to buy what they need, meaning newer players don't get as much money until they can buy a shop, which either then turns into an investment that works or dies.
I remember seeing this in Realmcade, we ran out of shops, shops were only owned by those who could afford and sell blocks that were cheap / different, and the wait time for a shop was insane.