So I have 1 dirt miner, pulling in 0.00004 Satoshi/s. A second one costs 152 Satoshi, making my total Satoshi/s 0.00008.
If I upgrade the 1 miner I have to level 2, it will also pull 0.00008 Satoshi/s, but it will cost me 250 Satoshi to upgrade.
With this logic, why would I ever upgrade a dirt miner, when I can just buy another one cheaper?
It's up to yourself! Miners are eventually getting more expensive as well.
What are the costs for further upgrades past level 2, and the price increase per miner? Im just trying to do some math here