You can always check your Transaction Log, which will show you how many customers you have had, as well as your earnings for a set time period, by default the last 30 days, but you can change the date range.
To access this log click on the View/Download Transaction Log option in the lower right of the Seller Admin page.
Buyers will pay directly into your account with the payment processor used for the order, which you setup within your E-junkie account. Payments for your products will never pass through our hands.