TheJoe wrote:
But imagine using the API to set up a billing system? Say one has a Linode for his hosting company, and a billing system on his company website for customers to login and pay or whatever, this system is linked with the Linode API to create a user account here, set up that account's details and then send payments first through the system before landing safely in the 'nodes credit.
If you replace "Linode" with "Paypal" then you don't have to imagine anything - are you sure you don't want Paypal?