Every point a viewer has earned across all of a streamer's chat games, added up: total points, game days played and their streak, with one shared leaderboard.
Points come from the games the streamer ran for that channel (Trivia, Wordle, Chain Reaction and the rest). Viewers are matched by the name they play under, so "Alice" and "alice" are the same person. Anonymous players are left out. A streak is how many of the channel's game days in a row a viewer scored on, newest first; miss the latest game day and it resets.