0x740ef5b5…9b4asent to0xc3c94e2d…4a49·#4,488,552·view on Etherscan
If they expand sideways too much then there will be less incentive to place blocks on top as the game will be saturated by small blocks and they will be less likely to be built upon, and they would end up wasting money. That's my pathetic attempt at pyramid game theory