An earlier iteration of the 31/07/2020 patch introduced a restriction where players would receive reduced matchmaking rewards if the battle ended before turn 15. This was reverted, and currently the restrictions are on:Matches which end before turn 6 (normal forfeiture cutoff)Matches played against the same opponents, if your ELO is below 550We'll be looking over the reward system to better handle griefing in the near future.