Every month, credits are renewed based on your plan. Credits you do not use go over to the next month, so you can also use them.
We accept payments via credit or debit cards only (no PayPal yet, unfortunately).
Sure, you can cancel your subscription anytime. Please note that your unused credits will expire when you cancel your subscription.
You can upgrade or downgrade your plan at any time without losing your credits.
Yes. Stripe handles our financial processing, so we don't store any information about your card. In addition, Stripe has excellent bank-level security standards.