WooCommerce Subscriptions

1. Sync maximum duration for each periodic unit. 5 Years, or 60 months, etc. At the moment, customers who switch tend to lose out on total subscription duration if they move from annual (max 5 years) to monthly (max 24 months) or weekly (max 52 weeks).

2. Remove pre-defined renewal durations. Instead, provide an input box for Shop Managers to set the number of Years, Months, Weeks, or Days. This helps to overcome limitations of certain payment gateway.