How Does Competition among Miners Influence Their Transaction Selection Strategy?

Competition among miners forces them to adopt the most profit-maximizing transaction selection strategy. If a miner were to include low-fee transactions while others included high-fee ones, the non-profit-maximizing miner would earn less revenue per block.

Over time, this lower profitability would force them out of business. Therefore, competition ensures that all rational miners are incentivized to select the highest fee-per-byte transactions, creating a uniform, highly efficient fee market and a consistent selection strategy across the network.