Whether you choose to purchase the Premium Pass or the more expensive Premium Pass Plus, the Premium Pass Booster is available for $14.99 after the initial Premium Pass offer. It does not provide any additional rewards on top of the Premium Pass, but instead boosts your Season Points to immediately unlock the next few milestones of rewards.
These points are added to your current total of Season Points, meaning that you can purchase the Premium Pass Booster whenever you like -- perhaps if you're running out of time but want those final rewards?
These points are added to your current total of Season Points, meaning that you can purchase the Premium Pass Booster whenever you like -- perhaps if you're running out of time but want those final rewards?