Not so fine print: Most reports cost 1 credit. For recurring accounts, credits are reset monthly to your account limit. Additional top-off credits can be purchased any time you need, at your monthly subscription rate. Top-off credits never expire. There is no activation charge, and you can cancel your subscription at any time.
All payments are via Paypal. You do not need to register for a Paypal account for Pay-As-You-Go credits, but you will need a PayPal account for a subscription.