You use Leadexplorer with a subscription which can be paid for in advance using credit card. When you enter your card details they will be stored on file to be used automatically every time the subscription renews.
When purchasing a subscription you choose the renewal interval to be "per month" or "per year". A subscription will automatically renew at the end of each period.
You can cancel our subscription at any time from within the application. When cancelled the auto renewal stop and the subscription will expire at the end of the current subscription period.