Yes you can, obviously the easiest way is to add a standard credit or debit card on signing up. However, If you don't own a credit card or a Paypal account, don't worry, you can use your Swirl prepaid MasterCard. I know, technically still a credit card but pay as you go.  Just make sure it has enough money on it every month to cover the subscription balance. You can also use PayPal if acceptable in your region. If you don't see the Pay Pal option when you sign up, it wont be available.