Unfortunately, the free trial does not work with PayPal. If you want to do a free trial, you have to use a credit card. It doesn’t work with PayPal because PayPal does not accept $0 transactions, unfortunately.
If you do want to use PayPal as your payment method, you could sign up for the first month for $8 and then let us know and to honor the free trial, we’ll extend your membership for 30 days for free (meaning, you wouldn’t be billed for your second month). Let us know if you have any questions. We’re here to help.