You can choose between either a subscription plan or one-time-payment. One-time-payment is recommended, if you want to process a large CSV file or if you prefer to use your credits on a irregular basis. You can charge your account with the required amount of credits at any time. Credits bought with one-time-payment can be used within one year. If you prefer to sign up for a subscription plan, your account will be refilled to the selected amount of credits every month. Subscriptions can be changed or canceled at any time.