There are social pressures, too. The payoff needs to be worth the risks associated with being "that person who attempted to double-spend". It's hard to rent hal

There are social pressures, too. The payoff needs to be worth the risks associated with being "that person who attempted to double-spend". It's hard to rent half a network the size of bitcoin without someone from the mining community speaking up about it. It's in the miners' collective best interest to preserve the immutability of Bitcoin.