Every Gameroom match you win adds points: your match score multiplied by the table's entry cost. For example, winning at the Diamond Table (1,000 coins) with 280 points gives you 280,000 leaderboard points. Wins against computer opponents count too, except in your first matches while you learn the game: the leaderboard opens after them.
Losses, draws and matches you leave add nothing, and Challenges and Dice Darts do not count. Your points add up until the leaderboard resets.
The trophy on each Gameroom table shows how much a win there counts compared with the Classic Table.