If you have Registered but did not fight any battles within the Round, you will automatically be Demoted due to the lack of a Score. You will also not receive any Rewards for the Round.
If you have Registered but did not fight any battles within the Round, your Registration will automatically be canceled for the next Round. You will need to Register again in order to participate.
If you have Registered but did not fight any battles within the Season, you will not receive any rewards.