Every tier there will be a reward for both a regular and a Premium Mega Pass.
How do I Level Up my Mega Pass?
You can level up your Mega Pass tiers by collecting stars.
Stars can be acquired by completing daily and weekly quests, and by
completing the Pass Grade Missions.
Once you have completed the quest, you can click on the quest and a
receive button will appear. Stars will only be received when you do
this, and the Quests will be reset daily and weekly so be sure to
collect your stars as soon as you finish your quests!