If you have Administrator rights to your account, you can convert your Presspage Connect trial into a paid subscription.
To do this, go into the 'Accounts & Billing' section of the Admin Settings, or click the "Upgrade plan" link in the bottom left corner:
This will take you to the order check-out page, where you will be quoted the price of the monthly subscription. Choose 'Proceed to checkout' to add your credit card information and convert your trial account into a paid account.
Note:
You will only have access to this information if you have Administrator rights.