Make the Metal farms more rewarding

While Metal farms are super powerful new items that let you build more epic bases, they hinder the inclination to explore, which affects how rewarding and replayable the game is. These farms can easily both benefit one’s need to explore while also granting the ability to create a megabase. To accomplish this, the placement of these metal farms should be adjusted as the game grows. A way to do this is by reducing the bacterial culture in the metal farm area to 1 (from 5), and then hiding the other pieces around the map in the most dangerous areas, an idea that is heavily inspired by the cuddlefish. This would make each mine feel much more rewarding and increase the need to explore.
Final note: If the game expands in size, the price of each metal farm could be increased 3x, and likewise for the amount around the map