For example, a recent 24-hour marathon had 24,000 players. Though not all playing at once, surely there were periods of time in which several thousand were play

For example, a recent 24-hour marathon had 24,000 players. Though not all playing at once, surely there were periods of time in which several thousand were playing/pairing at once. https://lichess.org/tournament/autumn21 https://lichess.org/tournament/autumn21