What's the difference between monthly, annual, and annual plan monthly payments?

Monthly payment: 

When you sign up for a monthly payment subscription, you pay for the first month immediately at the time you sign up. This is an auto-renew payment, you will be automatically charged a renewal fee every month until you cancel the subscription.

Annual payment: 

When you sign up for an Infinity Annual payment subscription, you pay for the entire year immediately at the time you sign up. This is an auto-renew payment, you will be charged an annual fee at the end of every billing cycle until you cancel the subscription.

**This plan is no longer available after 2020, unless you signed up for Annual before 2020, your subscription plan will auto-renew once per year. This plan is not refundable, if you damaged your headset or really need to cancel the plan, you may contact Viveport customer support for assistance.

Annual commitment payment: 

When you sign up for the annual commitment subscription, you pay for the first month immediately at the time you sign up. This is an auto-renew payment, you will be automatically charged a renewal monthly fee until your annual plan ends. Cancellation is available once you completed a payment cycle of 12-months. If no title were launched during the first 6 months, you may contact Viveport customer support to help cancel your annual plan.