Yes, a debit or credit card is required to start the 30-day free trial. You can start the 30-day free trial with a credit or debit card. You will benefit from 100% of the features available with the paid version during your free trial.
The paid subscription begins after the end of your 30-day trial period. Please note, however, that the Fabio plugin does not save your bank details. Your bank details are processed by Stripe for the account of Freemius click here to know how Freemius protects your bank datas.