You will need to use a credit or debit card if you want to complete the subscription process and need to renew each month.
It allows content creators to receive funding directly from their fans on a monthly basis as well as one-time tips and the pay-per-view feature.
It's possible that you've recently downloaded any money management app that helps you manage and monitor your credit and debit accounts.
However it is not possible to unsubscribe all creators at one click, but you can turn the off auto-renewal option.