I had a good talk with cubicdissection, and I hope you got all your questions answered
If you wish to sell to people not having a WalletBit account it is as simply as them clicking on:
Don't have a WalletBit account?Pay with your Bitcoin wallet as a WalletBit guestIn the checkout process. This will generate a bitcoin address and QR code for you to scan in order to pay the invoice.
When payment is done, the QR code will switch to show a receipt QR code, so your customers can scan this as well and receive a receipt for the purchase if they do not use WalletBit or WalletBit Mobile.
Our system will send the IPN (Instant Payment Notification) to your system, to let it know the purchase was completed successfully. It doesnt matter if you pay with a WalletBit account or if you pay with your own bitcoin wallet or similar.