The mBit Races is a recurring promotional tournament that takes place every 4 hours. Your position on the leaderboard is determined by the points you accumulate through playing slots. These points are calculated based on a multiplier score system. Let's consider an example: If you place a bet of 0.3 mBTC and win 3 mBTC, resulting in a 10x multiplier, you will earn 10 points on the leaderboard. It's important to note that only your highest multiplier achieved will be displayed on the leaderboard.
You can check the current races leaderboards here: